Default [Q] WiFi not connecting.

I have an Xperia Play. It is a UK model that has been unlocked. It is a dev model.

I am having problems connecting to WiFi. My brother (who gave it to me) says it was connecting in the UK. He bought over two of these phones niether of them will connect.

It wont list the available networks, thought it does scan. The mobile network/ internet is working fine.

Am I missing something?