Question: What British racing driver who won the Formula One World Championship drove a Formula One car built for the 1979 season by the Walter Wolf Racing team?

Context articles: Wolf WR1
Wolf WR5
McLaren M29
Wolf WR7
McLaren M28
Gilby Engineering
BRM P261
Johnny Mowlem
Jim Crawford (racing driver)
James Hunt

The Wolf WR1 was a Formula One car built for the 1977 season by the Walter Wolf Racing team.
 Four examples of the car were produced.
 The first, completed well before the start of the season, was the WR1.
 Another two identical cars were built: WR2, finished ahead of the first race; and WR3, ready in March 1977.
 At the end of the season, a fourth car, WR4, was produced with slight adjustments, and WR1 was remodeled in similar fashion for .
 The original car was driven exclusively by South African future 1979 World Champion Jody Scheckter in 1977.
 WR3 and WR4 were also driven by fellow future World Champion Keke Rosberg in the 1978 season.
The Wolf WR5 was a Formula One racing car built for the 1978 Formula One season by the Walter Wolf Racing team.
 A further example of the model was built, and was given the chassis number WR6.
 They replaced the successful Wolf WR1 halfway through the 1978 season, trying to challenge the new ground effect Lotus 78.
 However, Wolf was unable to repeat their competitive performance of , taking just three podium finishes with the WR5/6.
The McLaren M29 is a Formula One racing car built and run by McLaren during part of both the 1979 Formula One World Championship and the 1980 Formula One World Championship.
 The F version was built in 1979, but ran during five races of the 1981 Formula One World Championship.
 The M29F was the last of the M-numbered cars, as later in the season, the McLaren MP4/1 was readied for use in the championship.
The Wolf WR7 was a Formula One car built for the 1979 season by the Walter Wolf Racing team.
 Three examples of the car were produced.
 The first was WR7.
 A second car, WR8, was built to the same specification, while a slightly modified car, WR9, first appeared at the British Grand Prix.
 The cars were driven by 1976 champion James Hunt and Keke Rosberg.
 The engine was a Ford Cosworth DFV.
The McLaren M28 is a Formula One racing car built and run by McLaren in the 1979 Formula One World Championship.
 Powered by a conventional Ford Cosworth 3-litre engine, the M28 was designed and wind tunnel tested during the latter half of 1978, at around the same time as Ronnie Peterson was mooted to join the team for the following season.
 The car was noticeably larger than contemporary designs and was much bulkier looking.
 The bulky design had a sharp impact on top speed, and the car was one of the slowest through speed traps.
 During initial testing, the M28 was soon found to have problems with poor grip as its ground effect design proved not particularly effective.
 However, it was still the preferred chassis over its predecessor the McLaren M26, and it was used during the first half of the 1979 season until a better design could be introduced.
 McLaren were never in the running for the championship with the car, however it earned points and came third in the Argentine Grand Prix, 6th in the Belgian GP and 4th at Monaco.
 Its drivers were Patrick Tambay and John Watson.
Gilby Engineering was a motor racing team and later racing car constructor from the United Kingdom.
 The team competed in 12 Formula One World Championship Grands Prix, including 6 with cars of their own construction, but scored no World Championship points.
 The Gilby cars were constructed by Syd Greene for his son Keith to drive, having previously entered a Maserati 250F for Roy Salvadori and Ivor Bueb and also a Cooper for Greene Jr.
 Keith Greene later became better known as a team manager in Formula One and sports car racing.
 Gilby made its debut in the 1954 French Grand Prix with the Maserati, for Salvadori, who also drove for the team in and , and the team's last event was the 1962 Italian Grand Prix.
 After the team ceased competing in Formula One, the final Gilby car was purchased and entered in three events in , by privateer Ian Raby.
 Keith Greene achieved a third-place finish in the non-championship Naples Grand Prix of 1962, with the BRM-engined car, behind the works Ferrari's of Willy Mairesse and Lorenzo Bandini.
The BRM P261, also known as the BRM P61 Mark II, is a Formula One motor racing car, designed and built by the British Racing Motors team in Bourne, Lincolnshire, England.
 The BRM P261 was introduced for the 1964 Formula One season, and its design was an evolution of Tony Rudd's one-off BRM P61 car of .
 The P261 had a relatively long racing career; variants of the car were still being entered for Formula One World Championship Grands Prix as late as .
 During the course of their front-line career BRM P261s won six World Championship races, in the hands of works drivers Graham Hill and Jackie Stewart, and finished second in both the Drivers' and Constructors' Championship standings in 1964 and .
 Stewart, Hill and Richard Attwood also used works P261s to compete in the Tasman Series in 1966.
 The BRMs dominated, with Stewart winning four, Hill two, and Attwood one of the 1966 Tasman Series' eight races.
 Stewart also won the title.
 The works-backed Reg Parnell Racing team returned in 1967 with Stewart and Attwood, where Stewart added another two wins to his tally.
 In terms of races won and total Championship points scored, the P261 was the most successful car in BRM's history.
Johnny Mowlem (born 12 February 1969) is a professional British racing driver.
 Mowlem is considered to be among the world's elite sports car drivers, having competed in every class of world championship sports car racing.
 He is the 2013 European Le Mans Series GT champion, having previously won the British Porsche Cup championship in 1996 and 1997.
 He has class victories in both the 24 Hours of Daytona and the 12 Hours of Sebring, and has earned podiums at virtually all of the world's major sports car races, including the Le Mans 24 hours and the 1000 km Nürburgring.
 He has also achieved overall podium finishes at the Daytona 24 hours as well as at the famous 10-hour Petit Le Mans race in the USA.
 Mowlem began his career in single seaters racing up to Formula 3 level and got his big break when he was chosen personally by triple Formula One World Champion Jackie Stewart to join his "staircase of "talent" team in the junior single seater formula, alongside drivers of the calibre of Dario Franchitti, Allan McNish and Gil de Ferran.
 He switched to sportscars in 1996, winning the Class 1 championship of the British Porsche Cup and then gained international recognition the following year when he won all 17 races of the British Porsche Cup to become British champion.
 This launched his professional career in World Sportscars.
 Later in his career he gained further international attention for his work as a driver of the hybrid-powered Ginetta Zytek prototype racer in the ALMS in 2008 and 2009.
 In 2010, Mowlem was a Lotus Racing factory driver, driving the American Le Mans Series (ALMS) and in the International GT Open Series for sports cars in Europe.
 His latest driving championship came in the European Le Mans Series in 2013.
 Mowlem raced in the ALMS series every year that sanctioning body held races.
 Mowlem also operates his own driving academy, working with both corporate clients and drivers wishing for a career in racing.
Jim Crawford (13 February 1948 in Dunfermline, Fife – 6 August 2002 in Tierra Verde, Florida, United States) was a British racing driver from Scotland.
 His first motorsport experience came behind the wheel of a Mini that he drove in several rallies.
 After an unsuccessful stint in Formula Ford he landed a drive in his friend Stephen Choularton's team in Formula Atlantic, after showing great promise in a couple of Formula Libre races at Croft.
 He went on to spend a number of years driving alongside Choularton at SDC Racing in Formula Atlantic and was spotted by Lotus Cars and offered a test drive by them.
 He participated in two World Championship Formula One Grands Prix, debuting on 19 July 1975.
 He was also the winner of the 1982 British Formula One Championship.
 He is notable for being the 500th person to start a Formula One World Championship race.
James Simon Wallis Hunt (29 August 1947 – 15 June 1993) was a British racing driver who won the Formula One World Championship in .
 After retiring from racing in 1979, Hunt became a media commentator and businessman.