Just been on the blower with the local tyre slitters and there's apparently a deal on at the moment if you buy two or more Michelin's you get a £50 fuel voucher back, he's quote me at £125 ea for 225/40/18 which is good anyway so makes them even cheaper.
I assume the offer is a Michelin thing and it's on until the end of July so maybe worth asking about if your in the market for a set of these.