Yip, the Blue one is Colin's, and is a genuine 3.0csl. The red car is not Colin's, and is sporting a non-standard csl front airdam. The wheels are also non-standard, but period BBS type. Nice car though.
Yep, the blue one is my 1973 E9 3.0 CSL - number 289 of 469 fuel injected ones produced. I was at Tuks presenting a course on Tuesday which was why I it was there.
The red one belongs to my mate Frank although that front airdam is a copy from his original batmobile. The car was originally a 2800CS in white but now sports a 3.5 M30 motor from a 735i and of course was painted red.
The white one looks like a 2000 C (had the 2 litre 2002 motor with unusual front end) - there is a black one for sale on gum on at the moment.