Libya’s foreign minister Moussa Koussa is making a surprise visit to London from Tunisia, according to Tunisia’s official TAP news agency.
A Libyan government spokesman said Mr Koussa – in his post for two years – has not defected, but was travelling abroad on a diplomatic mission.
Mr Koussa flew out of Djerba airport bound for the UK on Wednesday afternoon, the report says.
It comes as the UK takes steps to expel five Libyan diplomats.
Rebels fighting Libyan government forces are continuing to lose ground and are retreating from their former strongholds along the eastern coast of Libya.
Earlier, Prime Minister David Cameron said the UK was not ruling out providing arms to rebels in “certain circumstances” but no decision had yet been taken.
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