Kate Rew: The Scottish Inner Hebrides are about as wild as wild swimming gets.
You can camp on uninhabited islands and swim with seals. The Gulf of Corryvreckan, a whirlpool of tidal flows that only calms down for an hour at slack tide, is a target with some swimmers, and can be attempted with SwimTrek.
The swim across the 0.6 mile stretch between Jura and Scarba is not to be taken lightly. At high tide, the water rushes through this stretch at 8.4 knots and creates a fascinating series of whirlpools and water patterns, due to a deep hole and rising pinnacle beneath the surface. At its height, the Corryvrechan is known as the third biggest whirlpool in the world
One of the most dangerous swims the UK offers, only attempt this swim under the supervision and guidance of experienced local boat cover. The Corryvreckan whirlpools calm down for about half an hour a tide, giving time to make the 1km swim across.. but only a local boat man will be able to read the water, and assist the crossing.