I think it's the Brackla flying group, they had a website at
http://www.bracklaflying.co.uk but I can’t get it to work...
Also there’s a possible TB20 share at Aberdeen...
Edit: Standard G-INFO aerostalking shows potential change in ownership for the Brackla PA28, so the group may have disbanded. Owner is shown as trustee of G-BHJO group, down at Biggin Hill. Brackla trustees are previous registered owners...