Thanks for your reply Wes
The catch is a bit strange, I had a look, there looks like there is a microswitch in there, but even after tampering with that, there was no difference.
With all doors closed and the boot too, the interior light just stays on, tried different things on the bonnet catch as well to see if the light went out, but it didnt.
Not had a chance to check on VCDS, any ideas where to look?