An anti-EU MP has said the publication of a national leaflet warning against Brexit is a tactic to distract attention away from Mr Cameron's personal tax affairs after he was dragged into the Panama Papers offshore scandal.
Labour's Graham Stringer suggested the announcement may have been timed to distract scrutiny from the prime minister after it emerged that Mr Cameron's father had set up offshore assets.
No 10 says Cameron does not benefit from offshore funds, but he is facing pressure to give more details of his assets.
"He hasn't answered the questions about his historical income and whether that has come from tax havens or not," Mr Stringer told BBC Radio 4's Today programme.
"He needs to answer that question and it's clearly very uncomfortable for him and this diverts attention."
Defence Secretary Michael Fallon said it was a low tactic to make the suggestion in a rebuttal of the claims.
"How could it be a diversion? This is a leaflet that has been weeks in preparation," he said.
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