There's an electrical reuse / repair service in Islington, I think its 222 Upper Street, part of the Green Living Centre. I think you can get more info on the Islington.gov.uk website... Is it called Bright Sparks?
They don't just repair as I've now found out. They will take your old stuff, repair and re-sell. But not repair for you to pay and continue to use. HOW STUPID IS THAT?