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.