MMmmm OK, don't feel too bad now.
The cicuit was the old circuit without Gerrards chicane.
First session out was 1min 17 to 18
Last session was 1 min 10sec
I know where my problem was, too slow going in Gerrards and Edwina's. OK (ish) coming out of both corners, but, slowed too much going in.
Guys that were passing me easily in the first few sessions either struggled or could not get past me in the last few sessions.
Saying that, I was in the inter / novice group. There were some very very fast guys in the fast group.