I have moved this away from the Level Crossings section.
I think Mike is right - to my knowledge there was never an operational box on the platform at Stamford.
According to the Signalling Atlas & Signal Box Directory book it is the original Stamford Station box moved "only a few feet" which doesn't make sense to me as it wasn't near the platform in the first place - see plan at http://signalbox.org/diagrams.php?id=847
. The book says it was used as a store by the bookshop which would explain its inaccessibility. The colour scheme sounds correct from Mike's description - see the preserved Armathwaite http://shop.studio433.co.uk/index.php?r ... ct_id=3936
for Midland Railway colours.