On the 13th February 2005, Steve Strange set a record of 276 days and 19 hours for a circumnavigation of the world by bicycle. On 15th February 2008, Mark Beaumont established a new record of 194 days and 17 hours. On 29th March 2009, riding at present, James Bowthorpe set out from London to establish a new record for the circumnavigation.

A circumnavigation requires that the rider pedal through 18,000miles/28,970km, with a total journey distance, including transits by boat or plane, in excess of 24,900miles/40,075km - an equator's length. The ride must begin and end at the same point.

The ride must follow an east-west or west-east direction, with any considerable deviations from such a course to be deducted from the total mileage.

The ride must take in two approximate antipodal points; this refers to points that would line up through the centre of the earth. On account of most of the earth's surface being water, there are few land-based antipodal points, however, some include Asuncion in Paraguay and Taipei in Taiwan, Perth in Australia and Hamilton on the island of Bermuda, Auckland in New Zealand and Seville in Spain.

When the rider and bicycle reach a port of transit, be it for a flight or a boat, the clock stops until rider and bicycle arrive together at the destination from which the circumnavigation continues.

The same bicycle must be used throughout the attempt.

For purposes of verification, a logbook must be kept in which a brief account of each day and mileage is detailed. Signatures should be collected from witnesses the rider encounters along the way, as should photographs of borders and landmarks found on the journey.

To register your own attempt at the record, or for a more thorough listing of the rules involved, visit guinessworldrecords.com
Map overlay showing antipodal points.