Guards at Britain's most secure prison have "lost control" amid fears that radical extremists are bullying other inmates into converting to Islam, the Old Bailey has been told.

Prisoners are reported to be terrified of being sent to maximum security Belmarsh prison because of the atmosphere created by a growing number of radical Muslim inmates.

A barrister claimed the situation was so bad that inmates in the Thamesmead prison were being held in "lockdown" to try to stop the bullying.

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