Went to Sainsbury's,its the nearest, put the filler cap with keys on the pump casing and , whilst pumping , a breeze blew it off.

Key fob broke, and it dont work now :(.

Turns over, and starts, and runs a few turns, and then stops.

A half an hour walk, and back, my wife's got a spare.

Anyone know a cheap 'key with chip' seller?

Most key cutting shops will either have one or get you one for just over £20

incidently, did you know that there are slots in the filler cap so you can hook it on to the filler flap when filling up.