A very special Williams-Renault Super Tourer.

Founded in 1977 by Sir Frank Williams and Sir Patrick Head, Williams Grand Prix Engineering Ltd.

are a successful Formula One motor racing team and constructor.

Winners of nine Formula One constructors championships and seven drivers championships their track record speaks for itself.

Between 1995 and 1999 Williams designed, built and ran the works Renault Laguna entries in the British Touring Car Championship.

Things started well, with the team taking the manufacturer's championship in their first year 1995, although 1997 was their best season by far, when they took 15 out of the 24 races and both the drivers and manufacturer's championships.

Those were heady days when most of the cars on the grid cost over £1m to build and budgets of £3-5m to run each car for a season were not uncommon.

Of all the manufacturer built cars in this period - it was the Williams Renault that was the most highly regarded.

This car, chassis no.99/04, was...