Jackie spills wine on Eltons shirt and he takes it off. But he then puts it on to buy pizza and there is no wine spill on it when he gets back.
When Elton is running along the wasteland in "Woolwich", the Pierhead Building and Norweigan Church in Cardiff Bay, both well known landmarks, can be seen in the background, revealing the fact the scene is filmed in Cardiff and not Woolwich.
At 13:40 when Victor Kennedy arrives a crew member is briefly seen left of screen at the back near a fire extinguisher.
Elton encountered David Tennant's Doctor in his childhood, but also knows that Christopher Eccleston's Doctor from Rose (2005) and Aliens of London (2005) is the same entity.