Ecuador's ambassador to the UK has left London to return home for talks on the WikiLeaks founder Julian Assange's application for political asylum.

Anna Alban is travelling to meet Ecuador's president, Rafael Correa, in the capital Quito, where she will personally brief him on Assange's application. She will also hold a series of meetings at the foreign ministry.

Assange arrived at Ecuador's embassy on Tuesday in the latest dramatic twist in his fight to avoid extradition to Sweden, where he is wanted for questioning over alleged sex offences.

A spokesman for the Ecuadorean embassy said: "Ecuador presently finds itself in a unique situation and it is important that those responsible making the final decision on Mr Assange's application are fully briefed on all aspects of the present situation."

Ecuador says Assange is under the country's protection while it considers the application. Assange, 40, faces arrest for breaching the terms of his bail if he leaves the embassy.

The British Foreign and Commonwealth Office confirmed in a statement that the Australian was "beyond the reach of the police" while he remains in the building.

Assange was set to be extradited to Sweden, where he faces accusations of raping a woman and sexually molesting and coercing another in Stockholm in August 2010 while on a visit to give a lecture.

Assange, whose WikiLeaks website published a mass of leaked diplomatic cables that embarrassed several governments and international businesses, denies all accusations saying the sex was consensual and the allegations against him are politically motivated.

• This article was amended on 2 July 2012 to make clear that Julian Assange has not had charges brought against him in Sweden.