BP (British) Formula Atlantic Series Race
Mallory Park, 1 Apr 1973
|1||Colin Vandervell||March 73B  - Ford BDA Smith
#29 Team Triplex (see note 1)
|2||David Purley||March 722  - Ford BDA Eden
#23 (see note 2)
|3||John Nicholson||Lyncar 003  - Ford BDA Nicholson
#22 Pinch Plant Ltd
|4||Jas Patterson||March 722  - Ford BDA Hart
#10 Texaco Team Racing/RIR (see note 3)
|5||Tom Pryce||Royale RP12A  - Ford BDA RES
|6||John Lepp||Chevron B25 [25-73-08] - Ford BDA Smith
#24 Central Garage [Mirfield] Ltd
(see note 4)
|7||Ken Bailey||March 722  - Ford BDA Eden
#8 Graham Eden Racing Team (see note 5)
|8||Jim Murdoch||Tui BH2  - Ford BDA Smith
|9||Stephen Choularton||March 73B  - Ford BDA Autovita
#12 (see note 6)
|10||Reg James||Brabham BT28/35  - Ford BDA James
#17 Super-Ser Luxury Refrigerators
|11||Colin Andrews||March 712M [11 as '9'] - Ford BDA
#26 Promoto [Racing Services] (see note 7)
|12||Bob Salisbury||Brabham BT35  - Ford BDA Eden
#19 Gerard Racing Services (see note 8)
|13||Ray Mallock||March 73B [712M-5] - Ford BDA Swindon
#11 Chequered Flag (see note 9)
|R||Cyd Williams||Brabham BT40  - Ford BDA Eden
#5 Graham Eden Racing Team (see note 10)
|R||Chris Meek||Motul M1  - Ford BDA Broadspeed
#1 Tate of Leeds (see note 11)
|R||Mike Mather||March 722  - Ford BDA
#27 (see note 12)
|R||Syd Fox||Huron SS0 A2 ['1'] - Ford BDA Smith
|R||Martin Webb||Chevron B25 [25-73-05] - Ford BDA Hart
#7 (see note 13)
|R||Stan Mathews||Ensign LNFB/73 - Ford BDA Richardson
#25 Promoto [Racing Services]
|DNS||Ian Mawby||Lotus 69 [71/69.8.FB] - Ford BDA Norvic
#6 (see note 14)
|Did not start|
|DNS||Sonny Rajah||March 732B - Ford BDA Hart
#20 Scott Gormley (see note 15)
|Did not start|
|DNQ||Brian Robinson||Ensign LNF2/72 [F2-1] - Ford BDA Titan
#28 Titan Engine Services (see note 16)
|Did not qualify|
|DNQ||Robert Cooper||March 722  - Ford BDA Cosworth
#3 (see note 17)
|Did not qualify|
|DNQ||Robin Smythe||GRD 372 [036-F3] - Ford BDA Nicholson
#14 (see note 18)
|Did not qualify|
|DNQ||Jonny Dimsdale||March 722 [723-9] - Ford BDA
|Did not qualify|
|DNQ||Malcolm Wayne||March 712M  - Ford BDA RES
#18 (see note 19)
|Did not qualify|
|DNA||Geoff Friswell||Surtees TS10  - Ford BDA Hart
#21 (see note 20)
|Did not arrive|
|DNA||Peter Wardle||Surtees TS15  - Ford BDA Eden
#9 (see note 21)
|Did not arrive|
All cars are 1.6-litre F/Atl unless noted.
|1||David Purley||(F/Atl) 1.6-litre March 722  - Ford BDA Eden||0.44.2|
|2||John Nicholson||(F/Atl) 1.6-litre Lyncar 003  - Ford BDA Nicholson||0.44.2|
|3||Colin Vandervell||(F/Atl) 1.6-litre March 73B  - Ford BDA Smith||0.44.4|
|4||John Lepp||(F/Atl) 1.6-litre Chevron B25 [25-73-08] - Ford BDA Smith||0.44.4|
|5||Cyd Williams||(F/Atl) 1.6-litre Brabham BT40  - Ford BDA Eden||0.44.8|
|6||Tom Pryce||(F/Atl) 1.6-litre Royale RP12A  - Ford BDA RES|
|7||Jas Patterson||(F/Atl) 1.6-litre March 722  - Ford BDA Hart|
|8||Jim Murdoch||(F/Atl) 1.6-litre Tui BH2  - Ford BDA Smith|
|9||Stephen Choularton||(F/Atl) 1.6-litre March 73B  - Ford BDA Autovita|
|10||Ian Mawby *||(F/Atl) 1.6-litre Lotus 69 [71/69.8.FB] - Ford BDA Norvic|
|11||Ken Bailey||(F/Atl) 1.6-litre March 722  - Ford BDA Eden|
|12||Mike Mather||(F/Atl) 1.6-litre March 722  - Ford BDA|
|13||Reg James||(F/Atl) 1.6-litre Brabham BT28/35  - Ford BDA James|
|14||Syd Fox||(F/Atl) 1.6-litre Huron SS0 A2 ['1'] - Ford BDA Smith|
|15||Bob Salisbury||(F/Atl) 1.6-litre Brabham BT35  - Ford BDA Eden|
|16||Ray Mallock||(F/Atl) 1.6-litre March 73B [712M-5] - Ford BDA Swindon|
|17||Martin Webb||(F/Atl) 1.6-litre Chevron B25 [25-73-05] - Ford BDA Hart|
|18||Colin Andrews||(F/Atl) 1.6-litre March 712M [11 as '9'] - Ford BDA|
|19||Stan Mathews||(F/Atl) 1.6-litre Ensign LNFB/73 - Ford BDA Richardson|
|20||Sonny Rajah *||(F/Atl) 1.6-litre March 732B - Ford BDA Hart|
|* Did not start|
Notes on the cars:
- March 73B  (Colin Vandervell): New to Colin Vandervell (Purley, Surrey) and raced with great success in the Formula Atlantic in the UK in 1973, winning four races, and securing the Yellow Pages Championship. Sold to Des Donnelly (Naas, County Kildare, Ireland) for the Irish Formula Atlantic series, and raced by him in 1974 and 1975. This must be the March "74B" advertised by Gerry Kinnane in Belfast in June 1976. There is then no mention of the car in 1976 or 1977, but in 1978, the car was raced by Ken Fildes (Clonskeagh, Dublin), and it had been owned by Kinnane for part or all of this period. Sold to Graham Brown, who took it to Australia when he emigrated in 1979, and raced by him in Western Australia in 1980 and 1981. Also raced by Joe Ricciardo in 1981. To Rod Housego, and raced by him in Western Australia in 1982 and 1984. Acquired by Richard Carter in 1988, and restored. Raced by Carter in HSRCA events from 1999 to 2002. Later to George Makin (Melbourne), and raced by Andrew Makin in historic events from 2003 onwards.
- March 722  (David Purley): New to David Purley and entered by Lec Refrigeration Racing for him in F2 in 1972. Retained for 1973, but converted to Formula Atlantic, fitted with Falconer bodywork and run in the two British championships, winning the opening race of each championship. At Silverstone in May, Autosport reported that the car was appearing for the first time in 73B bodywork and using narrow track. Photographs of the car at the following race, which Purley won, show that it also had front-facing rollhoop supports, which are usually indicative of the 1973 March monocoque, and a more detailed picture of the car at Silverstone in July shows that the front suspension also indicated it now had a 1973 monocoque. He used the car to the end of the season, winning five races in total. It was then raced by Dieter Quester at Macau at the end of 1973, who was said to have bought the "73B". However, Quester's recollection was that it was rented by Team Harper for him to drive. Subsequent history unknown, but possibly sold in the Far East. The car would probably have been indistinguishable from a 73B by this time.
- March 722  (Jas Patterson): New to Bill Gubelmann (Oyster Bay, NY) to use in the 1972 Yellow Pages Formula Atlantic championship. The car was blue and yellow, and wore #16 all season. Gubelmann won six races and narrowly pipped Cyd Williams to the championship title. The car was sold to fellow American Jas Patterson (Rosslyn Heights, NY) for 1973, repainted red and white, and entered for him by Texaco Team Racing/RIR in the 1973 British season. Patterson crashed heavily at Oulton Park in May 1973, and although the car was rebuilt, he appeared a few races later in what appears to be a new 73B. Patterson raced the 73B for the remainder of 1973 and through 1974, but the 722 reappeared in early November 1974 when an ex-Patterson "722/73B" was acquired by Roy Baker (Ferndown, Dorset) and raced regularly by him through the 1975 season. Subsequent history unknown.
- Chevron B25 [25-73-08] (John Lepp): New to George Silverwood and entered by his Central Garage (Mirfield) Ltd for John Lepp in British Formula Atlantic in 1973. Also used by Lepp in the first European F2 round at Mallory Park, with the 1.6 BDA still in it. Lepp's sports car racing took priority from July and the B25 was sold to Patsy McGarrity (Belfast, Northern Ireland) for Formula Ireland racing. Loaned by him to Chevron cars for John Watson to use in the F2 race at Albi. Converted back to Formula Atlantic for McGarrity to race in the 1974 Irish season, winning eight races and the All-Ireland championship. Sold on to Pat Woods (Newcastle, County Wicklow, Ireland) for 1975, and retained for two further seasons. Last seen when Woods crashed heavily in practice at Phoenix Park in September 1977, when the car was described as wrecked. Woods' daughter later told James Murray that he sold the wreckage of the B25 to Bobby Howlings. Subsequent history unknown.
- March 722  (Ken Bailey): New to Graham Eden Racing in April 1972 for Cyd Williams (Sandbach, Cheshire) to drive in British Formula Atlantic. It replaced the Chevron B18 which had taken Williams to two wins earlier in the season. Once he had the car to his liking, Williams won six out of the next nine races, but narrowly lost the championship to Bill Gubelmann. Run by Graham Eden Racing for Ken Bailey (Stretford, Greater Manchester) in 1973, and fitted with Falconer bodywork in May. The car was sold to Philip Dowell (Ombersley, Worcestershire) for 1974, but during pre-season testing at Silverstone, he hit the bank heavily at Woodcote corner and died later in hospital. It is assumed that the March was destroyed in the accident.
- March 73B  (Stephen Choularton): Stephen Choularton (Hale Barns, Cheshire) acquired the first production March 73B and raced it in libre events and in the British F/Atlantic series with support from Autovita Developments Ltd. His mechanic Jim Crawford also raced this car in a libre race that year. Choularton continued with the car in 1974 when it was driven by Crawford in one round, at Brands Hatch in September, after Crawford had damaged his usual car. The car was next seen in May 1975 when Choularton dusted it off for Cyd Williams to drive after Williams had wrecked Graham Eden's Brabham BT40. Choularton retained the car, unused, until 1977 when it was sold to Paul Gardner (Preston, Lancashire) and used in libre racing in 1977. It then travelled out to the West Indies, quite possibly via Manchester-based racing car dealer Bobby Howlings, who would have known Gardner well, and was a regular visitor to the West Indies series. Raced by Mark Moodie in 1978 and 1979, winning the 1979 Jamaican National Championship. Subsequent history unknown, but it may have gone to Gordon Gonsalves in Trinidad.
- March 712M [11 as '9'] (Colin Andrews): New to the Shell Arnold team for Jean-Pierre Jaussaud to race in F2 in 1971. Raced by Ferrari F1 driver Clay Regazzoni in the final race of the season. To Colin Andrews for 1972, now wearing the 712M-9 chassis plate, and raced in Formula Atlantic in 1972 and 1973. Acquired by Mike Sullivan Racing/Multiglide International Racing, for Formula Atlantic again, first driven by Richard Robinson, then by Alan Jones, who astonishingly won the high-profile Martini International support race at Silverstone in May, and finally by Richard Knight. Subsequent history unclear, as three separate former Sullivan/Multiglide cars went to Norman Dickson in Scotland, to Kim Mather in Lancashire, and to the partnership of John Colley and Rhoddy Harvey Bailey in Derbyshire. Which was which may never be known.
- Brabham BT35  (Bob Salisbury): New to Bob Gerard in late 1971 and fitted with a Cosworth BDA engine for Bob Salisbury to race in British Formula Atlantic from October 1971 to April 1973. Then sold to Harry Gilbert (Aberdeen, Scotland), and raced by Gilbert and Ronnie Mackay in libre racing. It was advertised by Johnny Blades in October 1973, and by Bob Howlings' R.D.H. Racing (Bollington, Cheshire) in August 1974 when it was identified as the ex-Bob Salisbury car and was available complete except for engine. It was next seen three months later when John Wingfield raced it in the Boxing Day libre race at Brands Hatch, fitted with a 1.8-litre Cosworth FVC. He retained the FVC engine and ran the car with huge success in libre racing through 1975. In September 1975, it was sold to dealer Bobby Howlings, who raced it a couple of times and then sold it to John Thistlewaite, who entered it for Tim Wood in libre in 1976. By 1978, it was owned by Joe Applegarth, still with the FVC engine in it, and it next appeared in 1986 when Nick Overall used it in the HSCC Pre '71 series. Overall was given an HVIF for this car as BT35-43 in 1988, and many years later, in May 2006, it was advertised on race-cars.com from the UK still with this HVIF. In 2009, it was reported to be with Tim Kuchel in Australia.
- March 73B [712M-5] (Ray Mallock): New to Mike Beuttler, and raced in F2 in 1971 entered by Clarke Mordaunt Racing with Alistair Guthrie. This must be the ex-Beuttler 712M acquired by Hesketh Racing, and raced by James Hunt at the Rothmans 50,000, and then in the remainder of the F2 season. Sold by Hesketh to Ray Mallock, and updated by March to 73B specification for Mallock to race in British Formula Atlantic in 1973. The car was later rebuilt on the 73B tub that had been used as a bodywork buck. Via A.W. Brown Racing to Arthur Collier 1974 for Irish Formula Atlantic, then to Patrick Woods mid-season. Borrowed by Patsy McGarrity for the Boxing Day race at Mondello Park at the end of 1974. The car was later said to have returned to the UK via AW "Monkey" Brown, then moved through the trade to Roger Andreason, who sold it to his friend Charles Richards to be used in Monoposto in 1978. From there, it moved towards historic racing, but leading to some confusion as the car by now had a 73B tub and 73B bodywork. Its life in historic racing requires further confirmation.
- Brabham BT40  (Cyd Williams): New to Graham Eden Racing, and driven by Cyd Williams in the 1973 British Formula Atlantic championship. Retained by Eden and Williams for 1974. After Williams crashed the car at Brands Hatch in September 1974, it was raced by Richard Morgan and Tony Trimmer later that season. Retained by Eden again for 1975, with Cyd Williams again driving. To David Winstanley (Winsford, Cheshire) of Withers of Winsford for 1976, and raced in the Indylantic championship.
- Motul M1  (Chris Meek): Sold new to Chris Meek (Leeds, West Yorkshire) to run in British Formula Atlantic and libre racing, sponsored by his property company Titan Properties and with support from his local Ford dealer Tate of Leeds, but the team withdrew after just a few races and the Rondel was advertised in June. This is presumably the car used by Tom Pryce for three Atlantic races in July, and by Viv Candy in an end-of-season libre race at Croft. Sold via Fred Opert to Mike Rand (Greenwich, CT) for Formula B in 1974. When he received it, it was white with Titan Properties on the rear wing, just as Meek and Pryce had raced it. It was damaged in a road accident but repaired, but then crashed into the Armco during qualifying for an SCCA National at Road Atlanta. The monocoque was scrapped, but the rest of the car was rebuilt using the monocoque from 201, and taking that identity.
- March 722  (Mike Mather): New to John Calvert (Seaham, County Durham), and raced in Formula Atlantic and libre racing in 1972. The car regularly wore #77, and was described as white or blue. Sold to Mike Mather (St Helens, Merseyside) and used by him, and once by brother Kim Mather, in Formula Atlantic and libre in early 1973. Sold to John Kitchen in mid-season, and used by him in sprints and hillclimbs in late 1973, 1974, 1975 and early 1976, using a BDA engine. Then to Peter Riley (Crosby, Liverpool), again for sprints and hillclimbs. At first it was said to have a Cosworth FVA engine, but it had a Richardson BDA in 1977. Riley was still using the 722 in speed events as late as 1984. According to speed event historian Steve Wilkinson, Riley retained the car, complete but dismantled, and stored in his garage. Riley died in 2011, and the car passed to Paul Gardner and Alan Newton, and Gardner started the restoration. When Newton died, the car was sold to Chris Simpson in 2014, but he did not use it. It went to Ashley Hodge in 2016, and then to Daniel Clayfield in 2017.
- Chevron B25 [25-73-05] (Martin Webb): Used by Martin Webb for the first half of the British Atlantic season but without a great deal of success, and also in libre events. Sold to Chris Skellern (Worcester) for libre races, hill climbs and sprints in 1974. Sold to Harold McGarrity (Belfast, Northern Ireland) for the 1975 Irish Formula Atlantic season. Retained by McGarrity for 1976, and also appeared a few times in 1977. Subsequent history unknown but a strong candidate for the 'B27' of Bosco O'Brien in 1978.
- Lotus 69 [71/69.8.FB] (Ian Mawby): Built for stock with white bodywork according to the Lotus built record. Fitted with a Cosworth FVC engine for Tetsu Ikuzawa to drive in the JAF Grand Prix in May 1971, then returned to Europe and converted to Formula 2 specification for Reine Wisell to drive. Advertised by Lotus Cars Ltd in March 1972 and apparently unused until early December when Ian Mawby (Cambridge) acquired the "ex-Wisell" car to replace the Lotus 69 he had wrecked at Brands Hatch at the end of November. Raced by Mawby until an accident at Snetterton in July 1973 left him badly injured. Mawby started to rebuild this car with a new chassis, but it was still incomplete when sold to John Bicht, an American expat. Bicht rebuilt the car with a number of his own ideas, including narrower front track and a Lola T360 nose, and raced it in Indylantic in Britain in 1976 as the "Swift SA1". He advertised the car in 1977, and eventually sold it to a friend in the US. Bicht made further improvements, including narrower rear track and a March nose. It was later sold by this owner to Joe Grimaldi. Subsequent history unknown.
- March 732B (Sonny Rajah): New to Sonny Rajah (Kuala Lumpur, Malaysia) and used in British Formula Atlantic in 1973. In August 1973, it was flown to South East Asia, where it spent the rest of its racing career. However, it is difficult to understand exactly how this car was used, as Rajah also owned a March 712M which was updated to 73B specification, and was also involved with a March 723 which had been converted to the local 1600cc 2-valve formula. At the Selangor Grand Prix at Batu Tiga in early September 1973, it appears that Rajah won using his updated 712M/73B, with the 73B being driven to third place by Percy Chan. Historian Eli Solomon reports that Rajah's 73B was bought by Jan Bussell a couple of weeks before the 1973 Macau GP, so would be the car Bussell drove for Team Rothmans at that race, through 1974, and in early 1975. In May 1975, Bussell left Malaysia for Zaire, and Percy Chan was moved from the team's second car to drive the 73B at the Penang and Selangor Grands Prix later in the year. The 73B's subsequent history remains unresolved, but it is thought to have been the car raced by Brian Tyler from 1976 to 1978.
- Ensign LNF2/72 [F2-1] (Brian Robinson): Originally built for John Burton (Kidderminster, Worcestershire) to race as a works Team Ensign F2 entry in 1972, the LNF2 failed to qualify for its first two races, and the project was abandoned. It is then belived to be the car used as a works Formula Atlantic car for Mike Walker, who won a championship round at Snetterton in July. The car was then fielded as a works Formula 3 car for Tony Trimmer to drive in October 1972. Sold to Brian Robinson (Stockton-on-Tees, County Durham) and raced in Formula Atlantic in 1973, plus a one-off F2 race. Robinson then bought a F5000 McLaren, and the Ensign was raced briefly by Roger Keele, and is then believed to have been sold to Martyn Denley in September. The car's movements from 1974 to 1978 are not yet decyphered, but from 1979 to 1984 it was hillclimbed by Peter Varley (Barnsley, South Yorkshire). Then via three other owners to Barry Pickard and raced in Historic F3 in 1993. Later raced in Classic F3 by Paul Newton 1993-95, and by Martin Woodman in 1994. Subsequent history unknown.
- March 722  (Robert Cooper): New for STP-March number two driver Niki Lauda for F2 in 1972 (won at Oulton Park in March), then for Pedro de Lamare in Torneio do Brasil. To Robert Cooper (High Wycombe, Buckinghamshire) for Formula Atlantic 1973, and rebuilt mid-season to 73B spec. Retained for early 1974, then sold to Dairmuid McFeeley (Clonee, Dunboyne, County Meath, Ireland) for Irish Formula Atlantic in 1974, 1975 and early 1976. To John Ledlie in 1976, then sold to Richard Lester (Yoxall, Staffordshire) for sprints from 1978 to 1984. With Keith Wanklyn (Wimborne) for hillclimbs from 1985 to 1990. Via three other owners to John Gale (Sydney, NSW, Australia) 2006. Sold to Australian-resident Englishman Steve Weller (Sydney, NSW) in 2017, who moved the car to the UK.
- GRD 372 [036-F3] (Robin Smythe): New to Robin Smythe (Hounslow, Greater London) replacing a March 723 he had raced earlier in the season. Smythe converted the car to Formula Atlantic specification for 1973 and although it was often entered for BP Formula Atlantic events, Smythe's actual race starts were rare. Throughout that season, his older March 723 was raced as a Formula Atlantic by Johnny Dimsdale and by Reg James. In 1974, the GRD was described as a 274 and continued to fail to appear or fail to start championship events, but was a regular starter in Formule Libre events at Silverstone and at Brands Hatch. It was not seen in 1975, but made a couple of entries in ShellSport championship events in 1976, predictably failing to appear. The car is believed to have gone to Dave Saunders in 1976, but that may have been a hire deal, and then later spent time in French hillclimbs before returning to the UK.
- March 712M  (Malcolm Wayne): New to Wilson Fittipaldi in May 1971, replacing the Lotus 69 with which he had started the European F2 season. Raced by Fittipaldi for the rest of the season as part of Team Bardahl. Retained for one F2 race in early 1972, then sold to Tate of Leeds (Racing) and converted to Formula Atlantic for Chris Meek to race in the British championship. Loaned to Sonny Rajah for the Brands Hatch Boxing Day race. Retained by Tate of Leeds for Malcolm Wayne in early 1973, then sold to visiting American Allen Karlberg (Seattle, WA) who took it back to the US. Entered by Karlberg for Monique Proulx at Watkins Glen in October 1974, by which time it had Falconer bodywork, and also taken to Trinidad for Formula Caribbean events where it was sold. By 1978 it was owned by David Kerr but it was "totally destroyed" in a towing incident at the "Love Bird International" meeting at Vernamfield Motorsport Park, Jamaica, in December 1978.
- Surtees TS10  (Geoff Friswell): A new car built to replace the TS10/03 wrecked by Carlos Reusch at Pau in May, and raced by him as a Team Surtees entry during the 1972 F2 season. Reusch retired after two races of the Torneio do Brasil, and Jean-Pierre Jaussaud drove the car in the final Interlagos race. Sold to Geoff Friswell for 1973, and converted to Formula Atlantic specification, but the Clubmen's expert had a poor run of results, which ended at Mallory Park in May when he spun off at Gerards and badly damaged the car. Friswell acquired a new March 73B to replace it, and the Surtees was advertised as complete but damaged in November 1973. The subsequent history of the wreck is not known, but its tub was later with Dave Allen as a spare for his TS10/01, and was still in its company when TS10/01 was sold by Peter Bromage to Don Wood in the late 1980s.
- Surtees TS15  (Peter Wardle): New to Peter Wardle (Wimbledon, London) and raced in British Formula Atlantic in 1973, winning from pole position at one race Brands Hatch in August. Retained for 1974, again in British Formula Atlantic, and then retained for a third season in 1975. However, towards the end of 1975, Wardle was entering Steve Carvill (Wimbledon, London) in some races, and it is unclear whether the team had a second TS15 by this point, as the pair never appeared together in the same race. Wardle acquired sponsorship from Radio Luxembourg and Applied Racing Techniques for 1976, and both Wardle and Carvill appeared in Indylantic and in Shellsport G8 during that season, presumably both still in chassis 06. Wardle advertised a TS15 in 1983, with FG400 but no engine and a mountain of spares. According to researcher David McKinney, chassis 06 and chassis 07 were with Tony Collinson in 1990, and chassis 06 appears to stayed with its sister through the ownership of Gerry Wainwright, John Elliott, Mark Griffiths and Crispian Besley, who had both cars in 2010. Beesley sold chassis 06 to Dean Forward in 2019, still in unrestored component form.
The identification of individual cars in these results is based on the material presented elsewhere in this site and may in some cases contradict the organisers' original results.
The British race results have been compiled by Chris Townsend based on material in Autosport and Motoring News reports in the UK plus the information supplied by a wide range of contributors.
Individual sources for this event
Autosport 5 Apr 1973 p24, Motoring News, Programme [DR]