I got a piece on Thursday from Spa Aluminium in Tunbridge Wells. Normally about £50 a sheet (allegedly), they charged £16.50 because it was damaged i.e. had about 2" bent over on one corner plus a few minor scratches. They had lots at the time, apparently a returned order - looks like the dropped the whole lot onto the corner.

The person I spoke to was Graham Reed.

http://www.spaaluminium.com/contact.html

Next Day Metals in Lowestoft 8' x 4' x1.2mm, scrap sheet (two dents from packing tape) £10 delivered

Last sheet I bought was £30 from Alcan Edenbridge, thats their minmum order so its possible 2 sheets would be better value............