Hi all - glad to report that the bargain appears to be mine! Picking it up tomorrow and thus joining the Thorn family. Now just need to sell some of my other bikes to accommodate it comfortably in the garage (and keep my non-cycling wife happy...).
I'm anticipating the Thorn will be my weapon of choice for long audaxes over the coming years (including London-Edinburgh-London next year). Now just looking forward to setting it up.