Thanks, all.
Although I haven't had the thing long, I can't honestly remember where I bought it! Old age.
I'll give Airfix a ring and I'm sure they'll sort me out, but thanks Mark for the offer to step in if they don't. The rate I build kits a few weeks is plenty, I probably won't have got any paint on by then.
I was thinking of doing the desert scheme anyway, I did the JE*J scheme on the old 1950s molding (I know it's not the same aeroplane but one of James Edgar's is ample).
John.