The government has suspended a foreign aid project after a BBC Panorama investigation found taxpayers' cash was being diverted to extremists in Syria, BBC reported.
A UK government spokesman said London takes allegations of possible co-operation with terrorist groups “extremely seriously”.
Adam Smith International, the British company running the project, strongly denies the allegations.
The Free Syrian Police was created following the uprising in Syria, to bring law and order to parts of the country controlled by opposition forces.
Britain was one of six donor countries funding the project, which provides community policing to the rebel-held areas of Aleppo, Idlib and Daraa provinces.
It is intended to be an unarmed civilian police force, and not co-operate with extremist groups.
Adam Smith International spokesman strongly denied BBC allegations.
