As part of the Donington Park 'Tribute to Ayrton Senna' at the VSCC's Richard Seaman Memorial Trophies meeting in June 2003 there was a demonstration run by some of the F1 cars Ayrton Senna drove in his career, including the two pictured below.
This is the Lotus 97T driven by Ayrton Senna in the 1985 season, winning two of the races whilst his team-mate Elio de Angelis won one.
Here's the 97T passing the pits during a morning warm-up session.
This is the Lotus 98T, a development of the 97T, which the team ran in the 1986 season. Senna again took two victories with this car whilst his team-mate Johnny Dumfries didn't manage to finish above fifth place in any race.
These photographs of the 98T were taken in the pits during the morning warm-up session.
The 98T returning to its pit. The two Ferraris in the background are the 1972 712 Can-Am Spyder of Carlos Monteverde (serial number 1010), driven that day by David Franklin, and the 1972 365 GTB/4 Daytona Competizione of John Bosch (serial number 14407).