Weeeellllllll, it's only 600 quid a year X 2 so 1200 quid. Yeah, give it a go, its only money.

You could try knocking all the neighbours of your present custies, that's free. Good luck anyway.
By the way, is that 40,000 new custies every week in Tesco, or the same 40,000 every week? If it's so good, you must have been lucky o get a slot eh?