My Vauxhall key broke some time ago (I`d lost the spare some years ago). I had a plain one cut for �5, put it on the keyring with the chipped fob & it works, although I do have to vary how I hold the two together sometimes to start. I recently went to a Vauxhall dealer with the key, number & code no. He said I neede to show the V5 logbook & it would cost about �38 & take a couple of days to get. He suggested using a mobile locksmith who would visit, cut, programme & cost about �30 plus. Ask for a quote. I`ve seen High Street key cutters offering programmed keys, not sure bhow much they charge though.