[dragonwriter]

> Ecuador tried to instate Assange as a Ecuadorian Ambassador, but the UK refused their request for diplomatic immunity

No, they tried to appoint him to a subordinate (not “Ambassador”) diplomatic position to Russia. Which does not give him diplomatic immunity in the UK by right. The UK declined to extend such status as a courtesy as it might otherwise do.

> However my point is that there is a case in 1984 where a suspected criminal for a crime committed in the UK (who might not have been embassy personnel) was allowed safe passage with embassy personnel.

Everyone leaving the embassy had their diplomatic status verified when they were stopped, questioned, and frisked on the way out, but it's quite possible the perpetrators were one of those who left before the cordon was thrown up, and if not they were embassy personnel. The act was clearly.a state act of reprisal, so there would be no reason to have it done by unprotected persons.