Croydon is really improving and there's actually a pretty cool surging tech scene there. As they have a lot of fibre, cheap commercial property, support from council and transport links. Not that I'm saying people should work in Croydon just yet as there aren't enough tech companies but there are quite a few medium sized ones and some startups.
+1 for living in Croydon. It's cheap, there's excellent transport links to the centre and it's easy to get out of the city and find some countryside.
Also to add to @brackin's comment, the Croydon tech scene has been gaining momentum for a few years and is at a really exciting stage. There's a real opportunity for Croydon to rival Shoreditch as a UK centre of technology.
