we're currently trapped in the UK, DH's visa has run out and the embassy is shut. We need to move out of the apartment to come home permanently, but we can't get there to do it.
@Chemenger
Sorry for posting twice, but I just suddenly thought - if one of you actually is a US citizen and the other is married to them then there is no problem at all about returning to the US.
This is from the actual Presidential Declaration from the Whitehouse website two months ago:-
Proclamation on the Suspension of Entry as Immigrants and Non-Immigrants of Certain Additional Persons Who Pose a Risk of Transmitting Coronavirus Disease
The relevant part of it reads:-
Section 1. Suspension and Limitation on Entry.
(a) The entry into the United States, as immigrants or nonimmigrants, of noncitizens who were physically present within the Schengen Area, the United Kingdom (excluding overseas territories outside of Europe), the Republic of Ireland, and the Federative Republic of Brazil during the 14-day period preceding their entry or attempted entry into the United States, is hereby suspended and limited subject to section 2 of this proclamation.
[...]
Sec. 2. Scope of Suspension and Limitation on Entry.
(a) Section 1 of this proclamation shall not apply to:
(i) any lawful permanent resident of the United States;
(ii) any noncitizen national of the United States;
(iii) any noncitizen who is the spouse of a U.S. citizen or lawful permanent resident;
There are more exceptions but these seem to be the ones relevant to your situation.
If the only issue is that the relevant person doesn't have a US visa or green card then, assuming they're British or European, they can still get an ESTA and enter the US at the moment although only for 3 months before having to do a quick exit and then re-entry.
If they are the spouse of a US citizen then they can enter directly or if not a spouse then after spending 14 days in the Caribbean.