Police officers were seen in footage being helped by a friendly boat owner as they chased a knifeman who had jumped into a river to evade cops.

The officers swapped their patrol vehicles for a boat moored on the riverbank while trying to apprehend Richard Shelton, 33, in Fiskerton, Nottinghamshire.

Nottinghamshire Police had rushed to the scene after the knifeman was spotted wielding a blade close to a pub on August 6 this year.

Shelton jumped into the River Trent and proceeded to swim away from officers and towards the opposite side of the riverbank.

Police shouted at members of the public to run for cover while stranded on the wrong side of the river with no way of getting across.