River Thames to the strong current of the river, but also other river users. Organised swimming events take place at various points generally upstream of Hampton Court, including Windsor, Marlow and Henley. In 2011 comedian David Walliams swam the from Lechlade to Westminster Bridge and raised over £1 million for charity. In non-tidal stretches swimming was, and still is, a leisure and fitness activity among experienced swimmers where safe, deeper outer channels are used in times of low stream. A Thames meander is a long-distance journey over all or part of the Thames by running, swimming or using any of the above
River Thames frost fairs River Thames frost fairs River Thames frost fairs were held on the tideway of the River Thames at London in some of the winters between the 17th century and early 19th century, during the period known as the Little Ice Age, when the river froze over. During that time the British winter was more severe than it is now, and the river was wider and slower, further impeded by the medieval Old London Bridge. Even at its peak, in the mid-17th century, the Thames freezing at London was less frequent than modern legend sometimes suggests, never exceeding about one year