An old supervisor of mine has put me in touch with someone he taught, who is looking for someone to fill a PhD studentship, after someone else dropped out. Its in an obscure area of building image modelling, that I know very little about but sounds interesting. However, it is in Reading, and although it doesn't require me to move, I would be based there pretty often. The other issue is that I have commitments to my research job in Cambridge, although I have never signed a contract they have been very good to me. I have a week to decide if I want to go for it... eep!
I mean its not every day you get an opportunity like this, but a PhD is not something to be taken on lightly...