30K?
Cut that by more than half, London branches may pay a bit more but 30k is just a silly amount
Its skilled/semi skilled labour, not rocket science
Lets put it this way, I was offered a mechanics job last year with a well known frame builder and it wasnt even half that figure
I am also a good mechanic and not one of the half arsed grease monkeys that Evans branches in london employ, look at the staff turnover rate, if its high you should avoid working there IMHO.