The personal digital assistants (PDAs) will also allow road policing officers to issue fixed penalty tickets at the roadside and for this information to be sent electronically to the Central Ticket Office.

BBC: Lothian and Borders Police are to use hand-held computers

The roadworks will last until April and then work will begin at the bus station with new shelters and a ticket office installed.

BBC: Ipswich bus station 'remodelling' begins

Shashi Verma, TfL's director of customer experience, said: ''Pay as you go Oyster cards do not expire and customers are able to return their cards to a Tube ticket office at any time for a refund of the remaining balance and card deposit.

BBC: Unused Oyster cards valued at ?55m

Charing Cross Theatre said it was not reasonable to require them to include the commission fee in ticket prices because the website also gave theatre-goers the option to book in person at the box office, where no commission was payable.

BBC: Box Office sign