You missed out by a couple of weeks on a very, very reasonably priced Swing!
Look on Gunstar, Guntrader or similar, TRs come up every now & then; 7.62 / 308 = the same thing as far as TR is concerned. Got a variation yet in your FAC? Might take a while depending on your local Police authority.
Fultons of Bisley have some secondhand stock - this one looks reasonable- but you will always pay a bit extra from Fultons. Useful though if you need quick adjustments/ tweaks.
To get a good rifle, decent action, good barrel, sights & reasonable stock, you will probably have to budget about £1k or slightly more.
Any TR club local to you to see if anyone is selling a rifle?