I could be getting confused with the missus' car!!! Ignore the light, I'm probably speaking sh*te. I still think your P plate will have a chip in the key tho.
You could take it to VW - ask them if it has an immobiliser chip in it. If they say Yes, say OK how much for a new one. If they say ?100 sir, say you'll think about it. If, on the other hand it's only ?30 get them to do it. The guys I spoke to in the key cutters wanted ?25. I'd be more inclined to get a VW one as I just wonder if you try and start it with a duff key it might do something horrible to your ECU - like shut it down?

Coz it thinks you're trying to nick it?

Others may have more of an idea about the likely impact of a key with no chip.