Vodafone has decked out 500 black cabs in London with mobile phone chargers that will allow the network's customer to charge their smartphones for free.

The move is part of a £10m advertising scheme highlighting the improvements the network has made to its coverage in London and will also see Vodafone customers given the ability to pay for their journey using their handset.

The network's customers can text the licence number of the black cab to a special code and the fare will be added to their bill.

Guy Laurence, chief executive of Vodafone UK, said: "We are committed to offering London the best possible network. We have already made hundreds of improvements to increase coverage, capacity and reliability to ensure Londoners can always stay in touch with friends and family."