The old spare key had the end broken off, so I got a new one cut from my good key (from the blank ordered in by Timpsons as they didn't have any Landy type in stock) and put the existing chip in the compartment in the new key, tried it and it worked fine. Now got two keys. I already had two fobs. I can understand if you loose a key and need a complete new chip programmed, that's when it becomes expensive. As I already had two chips I just needed the relevant key.