I don't think the US is on the hotel quarantine list, I'm open to be corrected on this though.
I think he's at his parents home in Southend. From Instagram it looks like Chris has been living down in Cornwall during this lockdown with his girlfriend and having a great time.
What's the deal with the current restrictions (so hard to keep up!) would either of them be allowed to travel to see the other or is that only allowed from next week? I also don't think homes are allowed mix for overnight visits....so even if they do see each-other I don't think they'll broadcast that because being caught out going to Cornwall last year really pissed James off.
Will be interesting to see what becomes of them now that he's back and neither of them have their own home, unless James kicks Chris out or they rent somewhere.
I was starting to get so bored of Emily so this is a great plot twist!!