@bluesqueakpip “the woman in the shop thing … could it be an oblique reference to Sarah Jane Smith?”

This would be consistent with the woman in the shop being in Ealing (associated with SJS), as the network […]

A couple of curiosities relating to The Snowmen – not sure what these indicate, but they might shed light on other theories:

The business cards for the Great Intelligence Institute (image here) show the address […]