I though I'd already mentioned this but it's not coming up in search. Short version: This is the best $15 I've spent in a long time!
This is distilled from a long oop 3 cd official bootleg. The producer recently posted about it on the Yahoo Ian Matthews group. It's also long out of print, but the seller I got it from is still offering it at 6 pounds.
Especially disc 1 which is mostly Iain Matthews with Richard Thompson on guitar fronting Pegg, Nichol, & Mattacks is to die for. CD #2 isn't as good, but has some great Thompson material & Tull's Anderson & Barre sitting in on 2 tracks. Ralph McTell also sits in.
Get it while it's still available!

http://www.amazon.co.uk/dp/B0001K2JSK/?tag=imwan-21