A police helicopter pilot who was seen flying extremely close to the ground as it chased after a man on a 'stolen' scrambler bike 'did nothing wrong', an investigation has concluded.

Footage shared on social media showed the National Police Air Service (NPAS) helicopter dramatically pursuing a motorcyclist through fields near Carr Mill Dam in Merseyside on August 13.

Merseyside Police said the bike was being driven in an 'extremely dangerous' manner, with the rider allegedly speeding, mounting pavements and nearly hitting a pedestrian.

A second man reportedly joined the rider on the bike as they fled officers along the A580 and through fields near a dam.

He later dismounted and was detained by officers on the ground, before the rider himself was arrested after running out of fuel. The bike was also seized.