I'll try and fill in what I can:
Birley/King Mitsu Starion-Cosworth - Stolen from Brands Hatch.
Tony Wolfe (in '92 Ron Cummings?) Honda Legend-Chevy - Went abroad
Farmer/Cox/Millichap/Wallace Sierra RS500-Chevy big block "Black Thunder" - Became Michael Blomfields Special Saloon - wiped out at Oulton Park in 2010, a small chance of getting rebuilt.
Dell/Boarer Toyota Starlet - unknown
Morton/Mortlock Toyota Starlet - last seen at Lydden in Sports/Saloons some years back
Jackson - Sierra RS500 - the ex-Sean Walker car. I think the Mahoney "Arquati" car ended up in thundersaloons as well. Yes it did.
Jackson/Liles Astra 2.4l - unknown
Maries/Nash Holden Commodore - unknown
Chilton/Philips Vauxhall Senator-Chevy - unknown
Shepherd/Whale Vauxhall Calibra-Pontiac? 6.6lire - is this at Mallory? - The one at Mallory was indeed the car built by Pilbeam for Bill Shepherd. Jon Mann owns it and hopes to get it finished one day. Bill also had a copy made - fixing some of the issues that the Pilbeam car had. That is owned and by Ric Wood and sometimes comes out in the BARC NW Sports & Saloons
Wilson/Birley "Armour All" Mazda RX7 - used to be beat even the Sertec Carlton - unknown.
Rod Birley ran a Honda Prelude turbo with Richard Piper in 93, again with Armour All sponsorship I think. - Sold first to Peter Thurston, then on to a very nice chap in the Channel Islands. For sale again £30K
Mike Chittenden Escort Cosworth - red spaceframe one - did this get destroyed at Snetterton? - Yes
Mustill RS500 - the all dark blue one with huge bodykit
Chatfield/Streather BMW M3 (ex-Tyson/Luby prods car? Had same livery) & 320i (white with blue underbody, big wheel-arch extensions) - probably sold by HMRC to recover funds owed
Ward/Dickinson Manta 2.4l - Still owns it I believe
Morris/Morris Peugeot 309 - Not sure, but another one was built by SHP and run by Paul McMillan - now owned by a chap not far from me who is rebuilding it all pretty!
Whale/Hodgetts - Toyota Supra - Unknown
Pearson/Marshall - Toyota Supra - Unknown
Both of these were ex 1988 BTCC cars, not modified a great deal but a lot faster out of GrpA especially with Hodgetts peddling.
Nick Crocker's Opel Monza-Chevy all white, big wing on the back. Nick sold the Monza and bought a Pontiac Trans-AM, which he used in Formula Saloons, and may well get back out in some shape or form....
Ashton/Hales Vauxhall Belmont 2.3l - another ex-BTCC car Oh no it wasn't! It was a ground-up built Thundersaloon, built by Empress Race Developments - and I have it now - with 6.7L of Chevy V8 in it
David Lesli ran a Merc 190-Chevy in 93 as well I think, my memory not as good. Another Empress Built machine - this one belonged to Jason Dell, had a F1 Powerboat engine, but was problematic. Sold abroad when Thundersaloons collapsed
Add to that Stewart Mortons Escort Chevrolet - which is 85% finished in the hands for Retro Motorsport - or a customer of theirs, plus Matthew Mortlock's Escort Cosworth, and who could forget the Donnan Brothers with their Empress built Sierra Cosworth (C-Fresh). Just before Thundersaloons folded, the car was being rebuilt using Quaife 4x4 running gear to complement a totally mad 2.4Cosworth YB that produced 740hp!!
and there was a Quaife/Hathaway Escort Turbo in 93 and I am sure a bright orange "Escat" with a Jag V12 shoe-horned into a Escort Cosworth 4x4, but it kept doing a few practice laps, breaking the final drives and not starting races I remember, was an amazing piece of kit while it was working.
Anyway, I have wracked my memory enough, here's a clip I posted on YT to start you off, help prove me right/wrong, thanks!
Oooo thems was the days!