As an avid follower of Snettertons racing history i recall severall Libre races in the 70's, some of which were part of the B.O.C Libre championship.
Do you remember Graham Eden ,Rod Pickering , Steve Thompson who went to race F5000, Bob Ellice, Canadian Jack Smiths Brabham, and deep sea diver hence Mermaid Racing entry of Fred Saunders Crossle.
I am sure Andrew Kitson a fellow Snett follower will remember some others
,oh yes my local man John Jordan and his GT40 and later McLaren M6?.
Ian Tee Ginetta G16 brm, which on one occassion started with a 10 sec penalty for not practicing, and came through the field to win beating Jordan's GT40.
Keep recalling more, Martin Denley Gropa CMC a quick regular but prone to mechanical failures.