We have booked a few lanes at Charlton Lido (SE18 4LX) to swim 100 x 100m (or as many as you can manage in four hours) this Sunday, 1 March, starting at 1pm.

This is a limited entry event with just 30 places available and is open to anyone who wants to challenge themselves to a 10km pool swim and meet and swim with some of the Outdoor Swimmer team.

Afterwards we will go the pub to recover and chat about swimming. Joanne and Simon from Outdoor Swimmer will be there to answer your questions about long distance and Channel swimming and open water racing.

 - Nutrition provided by Clif and Voom

- Prize draw entry with chance to win a Selkie kit bag, a Selkie hat or one of five pairs of Nike swim goggles.

After the swim there will be an informal Q&A with Joanne and Simon from the Outdoor Swimmer team. Bring along your questions about long distance swimming and open water racing, or just tell us what you'd like to see in future issues of Outdoor Swimmer magazine.

​Joanne Jones works in advertising sales at Outdoor Swimmer. She is an English Channel swimmer and last weekend became the International Ice Swimming Association's GB 500m Female Champion, and the third fastest female overall in the 1000m. In addition, she has swum Windermere, the Sandbanks to Fisherman's Walk EDOWSC 10.5km, Red Bull Neptune Steps, the Thames Marathon and was third fastest non-wetsuit woman at the first Waveney River Swim.

​Simon Griffiths is the founder and publisher of Outdoor Swimmer. His long distance swims include Vidösternsimmet (21km+ with wetsuit), Windermere (10.5 miles, both with and without a wetsuit), Champion of Champions and Coniston. He's previously won his age group at the British Swimming open water championships and has finished second and third in the Brownsea Island Swim. He also races in the pool (last year collecting bronze medals in the 400m and 800m FC for his age group at the nationals) and does the occasional swimrun, last year winning the middle distance event at the Great North Swimrun.