I had enquired with a couple of car locksmiths (neither of them very local) and they both quoted £300 (it is a 2 button remote key type).
At the suggestion of a garage owning near neighbour I contacted our local Suzuki Dealer who quoted £280 but because I managed to find the little metal tag which had the key number stamped on it (I had put it somewhere safe
![:D :D](./images/smilies/icon_biggrin.gif)
We had the new key 2 days later and worked fine even though it had been cut 500 miles away,we had to pop the car up to the dealer for 15 mins for the remote to be programmed to the car.