On the other hand, Assange and his lawyers have invited Swedish authorities to interview Assange there at the Ecuadoran embassy in London. They have refused.
Ok and if after said interview those Swedish authorities decide they want to arrest and charge Assange can they lead him out of the embassy in handcuffs back to Sweden?
They would have to violate international law to do it.
Which is probably why they will not bother to go to Britain and interview him in the embassy: if they decided to arrest and charge him they couldn't do it there anyways. It would be a waste of their time unless Equator agreed to let them have him if they decided to charge him after the interview.