Westminster City Council launched a new mobile phone text message service that will guide Londoners and tourists to their nearest public lavatory.
The service is available across the Westminster, an area that includes many of the capital's most popular sights, such as Big Ben, Trafalgar Square and Buckingham Palace.
Unlike in-car devices that rely on satellites to pinpoint someone's location, the SatLav uses mobile phone technology.
All that comes at a price, however. Rather than spending a penny, people will be charged 25 pence per text.
If the department stores or pub in front of you, will you still send the text message ask for toilet location, and then wonder around where is the toilet?!!!