Exterior shot supposedly in London - see the double-decker bus - except the vehicles are driving on the wrong side of the road. The scene was actually shot in Berlin, Germany.
A shot including the view from the London office shows St Paul's and the Millenium bridge. This would place the office on the site of the Tate Modern galley.
Lead male is so unattractive, that it is implausible to imagine two women fighting over him.