SBL707 was a factory MGA Twin Cam race car
From http://mgaguru.com/mgtech/twincam/tc107-1626.htm
"Chassis nbr. YD1/1626 .1762 ccm twin cam 4-cylinder engine with twin Weber carbs. 120 bhp. Factory built works car.
.... The factory entered a team of Twin Cams, bored out to 1762cc to compete in the 2 Litre class at the 1959 24 hours. This car YDI/1626 was built on March 9th 1959 and dispatched to the BMC Competition department on April 7th 1959. Heritage records confirm that it had no engine number at this time. It sent by MG chief designer Syd Enever to George Tuck, then managing director of BMC in Johannesburg where it passed to Ralph Clarke (later Leyland production director). Clarke later remembered the Twin Cam arriving in South Africa in immaculate condition, complete with twin cam engine, for use as a promotion vehicle and confirmed it was built as a factory race car and was in full sports car trim for competition work. He also remembers that the intention in SA was to race the car in national events, where it featured heavily over the next 2 years. In 1960 the car took part in races at the Kilkenny circuit, in the Cape Town acceleration tests and sprints driven by I Philips and two hill climbs in Paar driven by R Turner. It was further raced in South Africa in 1961 by Turner but then does not appear on the radar again until 1974 in the Cape Town "East London" Cape Town rally driven by Mike Jenkins. At this time the car was exported to Canada. Here it passed through numerous owners before being re-exported to the UK in the late 1980s, where the Halfway Garage sold it to Charles Tyler in 1991. The present owner acquired the Car in 1993 and imported it into Switzerland. "
It later changed registration to FSK152, presumably when it was re-exported to the UK in the late 80's.
Ralph Clarke is, according to Google, the man in the R-type.
96 MGF 1.8i: Project Rally Car
98 MGF Abingdon" 285H cams, modded head etc
87 MG Metro: 1440cc fast road car
88 MG Metro Turbo
70 MG Midget: 1.9L VVC + supercharger + RWD = YEEHAA!
72 MGBGT: Project Speed 6 MGB
05 MG ZT-T 260: wife's sensible car
01 MG ZS 180: LHD, for driving around Germany in