I just came back from travelling around Asia for 6 months.
What I didn't realise until I just checked is that I still have two months left on my old Swiftcover policy for my old car.
They're going to charge me £60 extra to move the insurance over to the GTi, so I think I'll do that for now, and do a bit more research for renewal time.
The only performance mod I have in mind right now is the Bluefin remapping in a few months. Although I'm open to suggestions!
With the comments above, I think going for a specialist insurer will be the way to go.
I used to use specialist insurers when I drove my Civic Type-R, and it always worked out very well financially.
Thanks again for all the input.