JRM and his family visited as well and played cricket, I suppose that can be done socially distanced.
According to the Times, Johnson wanted to release a picture of him and his newborn son together with his mum and sister. They weren't socially distanced so that would have been against the law, the law that Johnson himself reminded the nation of every day.
https://twitter.com/Steven_Swinford/status/1661849283493019648?s=20
It might sound petty but so many families stuck to those rules. It's like a drip drip of small things that paint the picture of one rule for them another for us.