MEL: So, why Ipswich train station?

(The Doctor pulls a piece of card from his pocket and hands it to her. It's an invitation to the birthday party of the Honourable Helen Lamprey. Guests are requested to arrive between 2pm and 4pm at the Ipswich Railway Station and call the Manor on 2847 whereupon they will be collected by motor car.)

MEL: (shrugging) Great. Who’s she?

DOCTOR: (checking the timetable for trains to London) I have absolutely no idea, but if no one comes to pick us up soon, I’m taking the train back to Liverpool Street and going shopping.