Joe Bennett: This is where the River Deben enters the North Sea at Felixstowe Ferry. It is very pretty hamlet and has hardly changed in a hundred years. The swim itself is very short five minutes but it the stretch of water has an almost mythical status locally a lethal piece of water as it has visibly strong currents and the water gets deep very quickly.
Despite the hazards I'd say it was safer than crossing the River Orwell to the south of the town where the UKs largest container port is situated. There are a couple of pubs and a great cafe for tea and locally caught fish and chips to refresh you after your dip.
Very strong currents it should only be tackled at slack tide and is easier after low tide