I might be able to help you out there at some point if you get desperate - I have a pair of Tannoy Cheviots with 12" dual concentric drivers, quite efficient I think, not exactly the latest model but kind of classics(ish), not sure if this is the kind of speaker you mean though. I'm in Yeovil which ain't far from you. You'd probably want to hear them in your system, so if you wanted to borrow them for a weekend I'm sure that could be arranged. I love 'em, they'd be the last thing in my system that I'd consider changing. Of course they have terrible spring terminals which I must get around to changing......one day....