Brabham BT35

This car competed in the HSCC Pre '71 Single Seater Championship race at the Historic Sports Car Club's Spring Historic Race Meeting at Oulton Park in May 1987.

It's Nick Overall's 1971 Brabham BT35 which the programme of the event says had a 1,598cc engine and raced in the Formula 2 Class. The car was apparently once owned by Bob Gerard and may be chassis number 43.

Brabham BT35

This car competed in the Historic Formula Racing Cars race at the HSCC's Summer Race Meeting at Oulton Park in July 1995.

It's Lincoln Small's 1971 Brabham BT35, shown in the programme of the event as having a 1600cc engine, so presumably it's a BT35C Formula 3 car.

Here's Lincoln Small during the race at Deer Leap, and you can see how much the track here drops down after Lodge Corner.