Channel swimmers training in Dover today say they will continue despite the death of a woman in her 30s. Susan Taylor died after swimming for 16 hours. Her death is being investigated.
The quickest route is from South Foreland near Dover to Cap Gris Nez near Calais, a distance of 21 miles, but the strong currents mean most people end up swimming much further.
Under the rules of cross channel swimming, wetsuits are not allowed which means the cold is one of the biggest obstacles, with temperatures as low as 13 degrees C.
Nashreen Issa reports and speaks to swimmers Kathy Batts, Sarah Dunstan, Sue Croft and record holders Clive Holder and Kevin Murphy.