The team set off from Dover on 3 August and reached Calais, 22 miles away, just over 14 hours later. Each swimmer did an hour before handing over to the next.
They hoped initally that they would beat 12 hours, but after they crossed the shipping lanes the wind increased to force five and the conditions became more difficult. The team swam without wet suits, wearing only swimming costumes, goggles and a swim hat.
The charity is also urging members of the public to take part in its Aspire Channel Swim challenge by swimming the equivalent of the width of the channel in their local swimming pools between 13 September and 5 December.