About 45:00, Bill Nighy's sunglasses disappear between shots while he's sitting at a table with Winona Ryder.
Early in the film there is a scene with Worricker and Aldous eating lobsters, and towards the end there is a scene where Worricker collects a lobster from a local fisherman. The lobsters are not Caribbean lobsters, but the North Atlantic variety.
Margot takes the Underground on the Jubilee Line into London Bridge where she meets Rollo. Margot tells Rollo off for his poor tailing skills and that she spotted him getting on the train at Aldgate East. Aldgate East station is on a different Underground line entirely which does not go to London Bridge.