To counter the new threat the British helicopters flew in pairs below 50 feet or above 500 feet.
Five helicopters - four French and one British - are standing by at a military airfield here.
United Nations officials said another British helicopter was due Wednesday morning.
British military helicopters flew over the crash site, pointing out large pieces of wreckage to the search parties.
British military helicopters started carrying some out of Lebanon on Monday.
Two British helicopters were sent in to evacuate the Canadians.
We flew from Bagram to here in a British helicopter.
After a 9-hour ordeal at sea, he was recovered by a British helicopter.
His paternal grandfather was the chairman of a British helicopter manufacturing company.
They landed safely, rescued by a nearby ship and British helicopters.