Boris Johnson is claimed to have blocked a complaint from his fiancee Carrie Symonds over negative reports about their dog Dilyn.
The PM said a proposed complaint opposing a story that claimed the couple wanted to rehome their pet was “a nonsense”, according to the Daily Mail.
Dominic Cummings told MPs this week that Ms Symonds was going “completely crackers” about a story in the Times about Dilyn – at a key point in the crisis last March.
Mr Cummings claimed Ms Symonds demanded staff deal with the March 11 story, while they juggled calls from Donald Trump for the UK to join a bombing campaign in the Middle East and decisions on lockdown.
A leaked draft of the 325-word letter shows the couple would have said the article was based on an “wholly false premise”.
It added the powerful couple had received abuse from the public, “misled into believing that we would callously rehome our much loved family dog.”
It also accused the page three story of breaking the journalists’ code on four counts, including “intrusion” into children’s lives. Ms Symonds was pregnant at the time.
Ms Symonds tweeted her denials at the time, describing the article as “a load of total crap”.
It’s claimed that after at first saying he would send the letter, Mr Johnson changed his mind after Mr Cummings intervened.
“The PM went along with it initially because Carrie was very cross,” an insider told the Mail.
“It was none of Dom’s business but he hated Carrie and went berserk.
“He told the PM it was a waste of time – and the PM agreed. He sympathised with Carrie’s feelings but said, ‘I can’t sign this – it’s a nonsense’.”
A No10 spokeswoman said: “The Prime Minister’s partner addressed these reports at the time. They are totally untrue.”