In London, buyers have been found for more than 600 officers, with most going to Transport for London, which manages the bus network.

ECONOMIST: Public and private security

On London's transport network, 88 Tube stations (out of more than 270) and 13 bus stations provided amenities for millions of travellers and the report urged the mayor to "push Crossrail to include public toilets at its stations".

BBC: Call for London 2012 toilet map