Brothers become first to swim world's biggest whirlpools

Three brothers from Penrith have become the first people to swim across the two biggest whirlpools in the world.

Jack, Calum and Robbie Hudson swam across the Saltstraumen whirlpool, which is considered to be the fasted in the world, before swimming across the Moskstraumen, which is the largest in the world.

Both whirlpools are in Norway and are powerful because of the way currents in the sea meet the shallow land-shelf, just below the water.

The current is so strong in the two whirlpools that that it can engulf boats so the brothers had to wait until the currents were less dangerous before taking on the two swims.

They said they did it to raise awareness of conservation issues in the area as well as to give themselves a challenge.

Last year the three brothers swam the length of the River Eden in Cumbria from its source to the Solway.

WATCH: Calum, Robbie and Jack Hudson after one of their record breaking swims