Mr Johnson said this morning: “Hi folks, the good news is that NHS Test and Trace is working ever more efficiently.
“The bad news is they’ve pinged me and I’ve got to self-isolate because somebody I was in contact with a few days ago has developed COVID.
“It doesn’t matter that we were all doing social distancing, it doesn’t matter that I’m fit as a butcher’s dog and feel great.
“It doesn’t matter that I’ve had the disease and I’m bursting with antibodies, we’ve got to interrupt the spread of the disease.
“One of the ways we can do that is to self-isolate for 14 days when you get contacted by NHS Test and Trace.
“I do it with a high heart, full of optimism and confidence”