Scores of Conservative MPs will openly criticse David Cameron in the House of Commons on Monday over his decision to spend £9.3 million of public money on a “propaganda” pro-EU leaflet.

Between 30 and 50 Tory rebels are considering supporting an amendment tabled by Sir Bill Cash demanding an increase in the amount the Leave campaign can spend ahead of the referendum.

While the move looks set to fail because Labour is unlikely to support it, Tory MPs will claim the Prime Minister’s decision has triggered a “tidal wave of indignation” across the country in an escalation of 'blue-on-blue' attacks over Europe.

In recent days an e-petition calling to “stop Cameron spending British taxpayers’ money on pro-EU referendum leaflets” has gathered more than 200,000 signatures - meaning it could be debated in Parliament.