The rifle is fairly local to me, and I've organised to have a look at it on Thursday. The seller tells me he has had it since 1990 and has never fired it. Apparently everything works as it should, except the forend hanger needs to be re-soldered back on.
It is marked Westley-Richards on one side of the action and Alex Henry on the other. Some engraving of a lion or tiger on the action (I can't remember what he said) Ebony forend tip, 3-leaf express sights, 26" barrel,Henry rifling that has no pitting but is a bit dark. I'll try and take some more photos myself, even if only for future reference.

David.