There is a post on the UK Prototype pages regarding Mr Collett's 8 wheel tender.
It seems there is more than one version of the allocation history doing the rounds (I have found 4 different versions all with errors it seems) . And there seem to be missing chunks/allocations (Post 5017 for example).
I'm posting this on here, where the GW aficionados lurk, to see if any of you can add to the discussion: photos of it in use, confirmed allocations (with references if poss