According to the WNBR Web site, bike races are planned in Brighton, Bristol, Bath, Edinburgh, and London and are open not just to cyclists, but also nude roller skaters and skateboarders.
London is expected to be the main event with around 1,000-2,000 participants lining up at the statue of Achilles in Hyde Park for a 10km (6 mile) ride which will pass some of London's most famous tourist sites, including Piccadilly Circus, Trafalgar Square, Big Ben and the Houses of Parliament.
The WNBR Web site contains useful information on what not to wear, comfort and safety while in the saddle, as well as where to hire bikes and skates, and how to deal with persistent and irritating photographers.
The organizers said that clothing is optional and there was no risk of arrest as police forces across the U.K. were aware that people would be naked, and would be providing traffic control for the event.
The annual bike ride has grown in popularity since 2004 when only 58 cyclists were bold enough to venture out growing to around 800 riders last year. It takes place in over 20 countries and more than 70 cities.
The weather forecast is not as hot as last year with temperatures expected to reach 20 degrees Celsius (68 Fahrenheit) in the capital with a slight chance of rain.
