The UK's first police remote control helicopter has taken off.
Merseyside police are using the "spy drone", fitted with CCTV cameras, mainly for tackling anti-social behaviour and public disorder.
The machine is 1m wide, weighs less than a bag of sugar, and can record images from a height of 500m.
Originally used by the military, it is due to be operational by June for a full three-month trial, which is the "first of its kind" in the UK.
The drone will also be used for monitoring traffic congestion and investigations are to be made into its possible role in firearms operations.
The machines, which are flown by remote control or using pre-programmed GPS navigation systems, are silent and can be fitted with night-vision cameras.