This is reported by Sky News.
“The Prime Minister and Miss Symonds are very pleased to announce their engagement and that they are expecting a baby at the beginning of summer,” the spokesman said in a statement.
It is noted that Johnson already has four children from marriage with lawyer Marina Wheeler.
On May 6, the son of Archie Harrison Mountbatten-Windsor was born to British Prince Harry and his wife, Duchess of Sussex Meghan Markle.