With key cutting it can be done by any highstreet locksmith/cutters. I asked in Timpsons on Saturday actually as I was passing, they wanted £35 unless you bring your own blank key, and then its just £8. For all the Mk3 boys out there, there was a thread with a link recently to ebay from a US seller, for the Mk3 - Mk4 adapted key for the fob. Think that was about £11 including delivery so all in all, far cheeper than Timpsons! Not sure about coding the immobiliser though sorry!