The featured marque at the VSCC SeeRed meeting at Donington Park in September 2005 was the Maserati and the photograph below shows one of the cars which took part.
The car isn't shown in the programme of the event, but it's Thomas Bscher's Maserati 250F V12.
The 250F was introduced in 1954 to compete in the new 2½ litre Formula, but by 1956 it was finding it difficult with the 6-cylinder car to compete with the Lancia-derived Ferraris and the British Vanwalls and it was decided to explore the possibility of fitting a V12 engine into the chassis of the 250F.
This car was purpose-built to use the V12 engine (in other words they didn't take an existing car and replace the 6-cylinder engine with the V12) and is serial number 2531.
The car only had one outing in a World Championship Grand Prix and that was at the 1957 Italian Grand Prix at Monza in the hands of Jean Behra where it retired due to overheating.
Before any further development was able to be carried out financial problems caused Maserati to pull out of racing at the end of the 1957 season.
Here's the car during the race at Donington Park at McLean's Corner leading the 1956 Maserati 250F driven by Rick Hall. Maserati retained the V12 engine when they sold the car and it was by this time fitted with a 3-litre V12 engine from a Maserati Tipo 63 sports car.