The MP husband of NHS Test and Trace chief Baroness Harding has been told to self-isolate after potentially coming into contact with someone who has coronavirus.

Tory MP John Penrose was alerted by the NHS Covid-19 app, part of the operation overseen by his wife.

Lady Harding has not been told to self-isolate, Mr Penrose said.

The Weston-super-Mare MP said on Twitter: “It never rains but it pours…. my NHS app has just gone off, telling me to self-isolate, which I’m doing.

“No symptoms so far *crosses fingers*”

Asked if he had spoken to his wife about it, he told the PA news agency: “We are trying to make sure we are doing it by the book, if I can put it that way.

“Her NHS app has not gone off, so it’s someone I have been in contact with rather than her.”

In response to a suggestion that it showed the system worked, Mr Penrose said: “I suppose it does.”