Thanks for the new thread tinseltits
(just realised you've festivised your name!)
Hope today goes OK groovee.
for you, and also demented 
Have to say I had a shiver of schadenfroid over the NS mask thing (and yes, it's a fab pub rookiemere. And a sufficiently easy and pleasant walk for a Sunday lunchtime that you feel you've done some exercise to merit the deep fried brie. Can't wait to go back!). Not resigning material imo, but at least she can see that it is so easy to not follow all the rules 100% of the time and not a sign of weakness, carelessness or deliberate flouting. Though the pub is really not shy with its yellow and black hazard tape on the floor and instructions to wear a mask whenever you're up walking around, so at least she can't blame them for not reminding her.
Also, I don't think agentcooper's version of FACTS from the last thread was given the credit it deserves! 
drspouse I don't think they should stay with your elderly relative. Hotels will be open for travellers who can't complete their journey (airport hotels at least) and they can journey up north the next day. Obviously it would be better if they didn't have to use a train, but not everyone has a crystal ball or the means of travelling by another means, so as long as they are careful with masks and distancing it should be fine. They're not Margaret Ferrier level CFs as they have no reason to expect they are infectious, and probably the sooner they are home to properly quarantine the better... If they caught it on the plane they likely wouldn't be infectious the day after, though they could be after 2-3 days if they stayed down south.