The following doesn’t necessarily mean that he’s leaving the Embassy just yet. And if he does, it’s hard to tell what will happen for sure.
British Ambassador: Julian Assange Is Free – UK Authorities Can’t Touch Him
January 13, 2018 Sean Adl-Tabatabai News, UK 0
http://yournewswire.com/british-ambassador-julian-assange/
That is a personal opinion by a former ambassador, and not a legal one. It’s also not clear that Ecuador has made him a member of the diplomatic staff. As an ordinary Ecuadorian citizen he wouldn’t have any special protection once he leaves the embassy.