UK: Growing fears over Muslim prison 'gangs'

Violent Islamic extremism is being promoted in prisons across England and Wales, according to inmates who have been speaking exclusively to the BBC. Former prisoners said they were able to watch Al Qaeda videos and to forcibly convert other inmates.

The Prison Officers Association warns that Muslim gangs are close to controlling parts of some prisons.

The Prison Service says it is "not blind to the risks" but insists the problem is being exaggerated.

Daniel Sandford reports. (...)