Well, after 22,000 miles of deafening tyre roar from Goodyear runflats, the fronts are now worn down to about 3mm, so I thought I'd take everyone's advice and stick non runflats on it.
the best value I could find, was on the net at Camskill,where I got a set of 4 Falken ZE912's for an amazing £186.20 inc VAT and delivery

just gotta hope the tyre machine at work is man enough to remove the damn things!! (never had to deal with runflats before!)
Do I need to inform my insurance company of this change??