The editor of The Sun has strongly defended his paper's report that the Queen expressed Eurosceptic views.
Buckingham Palace has lodged a formal complaint with the press watchdog over the story which appeared on Wednesday under the headline "Queen Backs Brexit".
Tony Gallagher, the paper's editor, said he had no doubt the report was accurate.
"Multiple sources – two sources to be precise – came to us with information about the Queen and her views on the EU and we would have been derelict in our duty if we didn't put them in the paper. It's as simple as that," he told the BBC Radio 4 Today programme.
"You are going to have to take my word for it that we are completely confident that the Queen's views were expressed exactly as we have outlined them both in the headline and the story.
"It is also the case that we knew much more than we published and that remains the case.
"We are in no doubt that the story is accurate."