A Libyan government envoy, Mohammed Ismail, has been in London in the past few days for talks with the British authorities, the BBC has learnt.
The Foreign Office said that in all its contacts with Libyan officials, it had made it clear that "Gaddafi has to go".
News of the visit emerged after Libyan Foreign Minister Moussa Koussa flew to Britain and was said to have defected.
Meanwhile, the US says air attacks have destroyed about a quarter of the Libyan government's military's capabilities.
http://www.bbc.co.uk/news/world-africa-12930169
Note: 1 April 2011 Last updated at 06:58 GMT