Why not just be happy where you are?
If its just the money and you love the job your doing now, surely money isnt everything, and job satisfaction is better, maybe my take on it is screww wif, i dunno.
I do know I would wanna be in a job that i waned to go to everyday, rather than one i didnt just cuz it gave me a few extra quid at the end of the month.
Good luck with your decision, and phone a friend !!!! said Tarrant !!