The Prime Minister's pregnant fiancee has coronavirus

Posting on twitter today, Carrie Symonds says she has been suffering with Covid-19 for the past week. 

32-year-old Miss Symonds said she has not yet been tested.

The couple's baby is due in early summer.

See also: Coronavirus: what's the advice for pregnant women?

In 2012, she worked on Mr Johnson's campaign to be re-elected as Mayor of London.