|Douglas Waymark died after setting off from Dover for France|
Douglas Waymark got into difficulty about half way through his swim, 12 nautical miles off the coast of Dover.
He was pulled from the water on Monday night by the English coastguard but later died at a hospital in Ashford.
His sister Jo Ikel paid tribute on Facebook, writing: "He was my brother and one of the most competitive people I know. He would always be the first to try something and then see if he could better it.
"He was a loyal and hilarious friend with a massive friendship group ... he is deeply missed by all who knew him as well as those who have only heard of him."
|The last 50 movements of Mr Waymark show the end of his journey|
Mr Waymark had already completed an 87 mile run from London, and was planning to cycle a further 182 miles to Paris once he reached the French coast.
He said the feat would be "arguably the toughest thing I have ever attempted" in a post on Facebook four days before his death.
"Just 25 people have completed it and of the last six attempts none have been successful.
"When I actually start is VERY weather dependant but I am hoping to get going on Friday night (tomorrow ekk!) / early hours of Saturday assuming there will be a swim window on Sunday."
The last update from organisers Enduroman, who were live-tracking his progress, came at 8:30pm.
It read: "2030 water taken. Moon is rising behind a cloud over Calais. Air temp dropping, light fading. #DougWaymark swims on. #Arch2Arc"
A tribute on Enduroman's website said: "Our friend Douglas Waymark sadly passed away swimming to France during stage 2 of his Solo Arch to Arc.
"He touched our hearts with his strength, organisation and quiet humour.
"He had gained massive respect amongst all who knew him."