Thanks for all the suggestions, guys! I'll definitely take a looks at the Ibanez and Peerless offerings, and see where we go from there (not in a massive hurry... have got a tax bill to pay at the end of the month-- we'll wait and see what the damage is!)
Phil: Honestly, i'm not sure! I'd like to go full jazz, but a semi makes a little bit more sense as a more versatile instrument. Ideally i'd like to have the full carved top-- but I think there's only one gibson thinline that had that (336?).
I hadn't seen those Midtown ones-- they look pretty good! I'll have to take a trip to one of the places in London next time i'm back (there's still somewhere that sells Gibson new, right? Maybe Wembley Guitar centre) I'm pretty sure that PMT here in Oxford won't have them, but i'll take a look anyway.
Tonewise, I think that as a beginner to the genre, just making the step from solid to non-solid body will be the biggest difference-- whether it is a hollowbody or a semi I doubt will have that much an effect for me, so it'd probably be wise I find an instrument that has a neck I enjoy :)