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Royal Navy ship helping to evacuate Britons from Libya

3 August 2014 Last updated at 12:03 BST

A Royal Navy survey ship, HMS Enterprise, is evacuating Britons from Libya, amid worsening violence in the country, the BBC understands.

The Foreign Office says it is not a "rescue mission" as normal transport links still exist but describes it as an "assisted departure" for those wanting to leave.

The BBC's Rana Jawad says this is a last-minute option for British nationals who risk being caught up in crossfire between rival militias.