1. Work permit number which starts with G....(G12344). I basically have the same question. I have a Tier 1 (General) visa that I would like to extend. In my wife's application (the updated version 02/2012) it asks for UKBA reference number of both mine and hers. What should I supply here? Any help ...

Did you provide two separate documents as proof of address for your wife? Thanks in advance.