A second operation involving UK special forces successfully rescued another 150 civilians from the Libyan desert on Sunday night, Defence Secretary Liam Fox said.
British oil workers were among the evacuees brought out of remote locations in the east of the violence-hit country to nearby Malta on three RAF C130 Hercules aircraft.
Another 50 UK nationals were among 200 people also headed to the Mediterranean island on board HMS Cumberland after its latest foray to the port city of Benghazi.
"The first and second aircraft have landed in Malta and the third is due to arrive shortly," Dr Fox said in a statement.
The latest evacuation mission came as Britain upped the pressure on Libyan leader Muammar Gaddafi by freezing his UK assets and barring him from entering the UK in line with UN sanctions. And with opponents of the regime preparing for battle in a city just 30 miles from Tripoli, Foreign Secretary William Hague joined international calls for the dictator to step aside.
"Of course it is time for Colonel Gaddafi to go. That is the best hope for Libya," he said.
In an unprecedented unanimous vote, the UN Security Council has also agreed to refer the brutal repression of the uprising to the International Criminal Court.
A charter flight landed at Gatwick Airport from Malta on Sunday evening carrying 78 Britons - among them oil workers dramatically plucked by special forces in the first such mission last night. Another aircraft is due to depart from the Maltese city of Valletta.
The Ministry of Defence revealed that one of the aircraft involved in the rescue mission appeared to have been struck by gun fire during the operation. "We can confirm that during the operation to recover civilians from the Libyan Desert, one of our C130 aircraft appears to have suffered minor damage consistent with small arms fire," a spokesman said.
"There were no injuries to passengers or crew and the aircraft returned safely to Malta. This incident shows how challenging the operating environment has been for our forces in assisting the evacuation efforts."