Splitting hairs - it's nearer 25 miles each way (I found the location of the farm). If it's true they only got out of the car for 15 minutes on the outskirts of Barnard Castle and they were 15/16 days from infection then it's a minor indiscretion
On the weekend we were told not to drive anywhere....
Next - putting local NHS resources at risk by using the local hospital. If they had stayed in London, then it would have been the local hospitals there - which were already dealing with a lot of Covid cases. His wife and son had been exposed to the virus and then they went to Durham hospital.
Not a good look all around, is it...