In the beginning of the movie at the 5:19 mark just after "cats & Dogs" appears on name tags, a #25 London bus is seen going to "OXFORD STATION" (That's a long journey for a London Bus!). On the way (According to the destination board)it goes through "HOLBORN CIRCLE" which doesn't actually exist. I used to work at Holborn Station and am now at Oxford Circus, so I can verify this.