Wikileaks founder Julian Assange, who is living at the Ecuadorean embassy in London, has a chronic lung infection “which could get worse at any moment”, Ana Alban, Ecuador’s ambassador to the UK, has warned.

Ana Alban said Julian Assange, who is fighting UK efforts to send him to Sweden, was suffering from living “in a confined space”.

Ecuador previously sought assurances he would not be arrested if hospitalized.

The UK said then it would not prevent “any medical care that he requires”.

Australian Julian Assange, 41, who has taken refuge at the embassy since June, was granted asylum by Ecuador in August.

Julian Assange, who has breached bail conditions by staying there, faces arrest if he leaves.

He is wanted for questioning in Sweden over rape and sexual assault allegations, which he denies, and was arrested in the UK on an extradition warrant.

“Mr. Assange, as everyone knows, is in a confined space,” Ana Alban said.

“Not only does the embassy have few windows but the city is also dark at this time – we have very little daylight in London.

“He is exposed to any health consequences from this lack of sunlight and lack of fresh air.”

Julian Assange, who is living at the Ecuadorean embassy in London, has a chronic lung infection which could get worse at any moment

Ana Alban said Julian Assange received visitors after embassy staff finished work.

“We work until at least 05:30 in the afternoon and, afterwards, he meets with certain people who want to visit him for different reasons whether they be activists, supporters, lawyers or friends.”

The ambassador said Ecuador was “waiting for a meeting” with either UK Foreign Secretary William Hague or UK Home Secretary Theresa May to discuss Julian Assange’s future.

Last month, Ecuadorean ministers said Julian Assange had “visibly lost weight” and that his health was “beginning to be jeopardized”.

Julian Assange’s Wikileaks website has published leaked sensitive diplomatic cables involving various countries, including the US.

In 2010, two women accused him of committing sexual offences against them while he was in Stockholm to give a lecture.

Julian Assange says the sex was consensual and that he believes the case to be politically motivated.

He says he fears being passed on to authorities in the US if extradited to Sweden.

But Swedish prosecutors have dismissed Julian Assange’s claims their case is part of a wider political move to see him stand trial in the US over his work with Wikileaks.