Dh has just given me a key for his car. On it is the dealer's tag, saying the make and reg no. We can't figure out how to remove it. It has two wire legs going into a plastic piece (onto which the details are written). I have squeezed both legs (hurts fingers), pushed the legs in, attempted to pull them out, and squeezed, pushed and pulled the plastic bit any way I can think of to release the legs .... After which I can use it on my own keyring!
It's an Arnold Clark one, if that makes a difference.