I'm not at all impressed by the impression DC has made over the past few days, and while I can understand his reasoning for heading north, that's about as far as it goes. I can't, like Boris, say he acted out of a parent's concern so everything's good, but I would have to say (and I would have expected a decent person to have admitted) that the motives were good, but on that occasion he made a bad call.
One thing I saw pointed out in a BBC article but I don't think has been mentioned here, is that on the day he ran out of Downing Street because his wife fell ill, later when she felt better he
went EDIT: is said to have gone back to work in Downing Street. Yet the advice has always been that if you live with someone with suspected COVID-19 symptoms, the whole household should stay at home for 14 days - not go back to work after a couple of hours. (Or for that matter drive to the other end of the country the next day.) Hmmm.
The BBC article is at
https://www.bbc.co.uk/news/uk-politics-52784290 - it assesses a number of aspects of the affair against the guidelines.