The queen , Prince Philip and Catherine visit Baker Street station . Prince William 's wife Catherine is expecting their first baby in July . Their visit is part of celebrations to mark 150 years of the London Underground . A new line was opened in December 2013 between Paddington Station and Elephant & Castle stations on the Piccadilly Line.
The queen , Prince Philip and Catherine visit Baker Street station . Their visit is part of celebrations to mark 150 years of the London Underground . A new line was opened in December 2013 between Paddington Station and Elephant & Castle stations on the Piccadilly Line.