97 MX-5 NA UK 1.8

[Moonpie21]

I have one of these and only one key...

I think there is an immobiliser, the dashboard has a lovely little yellow key and lock light on it that lights up as I start the car.

If I wanted a second key (as I may or may not be prone to misplacing them), do I need a special one?

If so anyone got any suggestions on where to get one, I am in Surrey. I am hoping not a Mazda dealer...