Put the key in the ignition, turn it until the lights turn on. Leave it for a couple of seconds no more than 5 seconds! Then take the key out, hold down the lock button and press the unlock button three times! The led should now flash five times and the car should automatically lock itself!
It should now be programmed to your car!
If this doesnt work try it a few times! If not you can buy a second hand key off ebay for about 15 quid! or go down the route I took and a really snazy flip key!