We have coloured glass splashbacks all the way around our kitchen - it was about £1200+vat for three lengths of roughly 4m,3m and 2m. We got ours from a local supplier in our town, there are lots of independent places. Our place could do pretty much any colour you could imagine.
We have a glass splash back on the wall above the hob to the extractor fan. We couldn't afford it all the way round the kitchen. We got ours from Magnet when they did our fully fitted kitchen. I can't remember how much it cost, but it is lovely, bright and easy to clean.
Very - that sounds idea. When you say a local supplier - a local supplier of what? Splash backs specifically? or tiles.....? I did approach a company online and was quoted £1800 which seemed a bit steep!