Brexit: UK's top EU diplomat Sir Ivan Rogers resigns
Jan 3, London: The UK's top diplomat in Brussels, Sir Ivan Rogers, has resigned.
Sir Ivan, who was appointed to the role of permanent representative by David Cameron in 2013, had been expected to play a key role in Brexit talks expected to start within months.
The Foreign Office said it would not give reasons for his departure at the moment.
Last month the BBC revealed he had privately told ministers a UK-EU trade deal might take 10 years to finalise.
He told them this was also the view of the other 27 member states.
BBC Brussels correspondent Kevin Connolly said it appeared there had been "some failure of synchronisation" between Sir Ivan and the UK government.
The Oslo Times International News Network