Not much luck with the sheet metal places here in Brum, so took a chance on Ebay. Quite a few metal places doing sploshbacks etc. on there. Got this 600 x 750 mm solid (no mdf backing nonsense) for 25 quid, including Parcelforce 48 delivery. Very impressed for the money. It's 1.1 mm thick brushed stainless, which is not the heaviest/lightest grade, but is still pretty solid. I'll see how it goes and if all goes well next year I'll template the entire length of the kitchen above the worktop, and plate it with the same, maybe in 2 mm. Very BIR!

Rob

Duck and mushroom in the foil container on the right; very tasty.