Labour will force a Commons vote calling for Jeremy Hunt to face an independent investigation for breaching the ministerial code.
The Cabinet minister held on to his job as Culture Secretary last night after Downing Street said his evidence to the Leveson Inquiry showed he "acted properly" in his handling of the News Corporation bid for BSkyB.
But shadow culture secretary Harriet Harman announced today that Labour would stage a vote when MPs return from Whitsun recess demanding Mr Hunt is referred for investigation to Sir Alex Allan, the Prime Minister's adviser on the ministerial code.
Labour believes Mr Hunt has mislead Parliament twice about his role in the bid and must also take responsibility for the actions of his special adviser Adam Smith, who was forced to quit when a slew of damaging emails were released showing close contact with News Corporation lobbyist Fred Michel.
Ms Harman said: "Jeremy Hunt has broken the Ministerial Code and misled Parliament.
"It is not acceptable that these rules have been broken and we will call a vote insisting that Jeremy Hunt's breaches of the code are referred to the independent adviser on ministerial interests.
"The Ministerial Code sets the standards which secretaries of state must live up to. When David Cameron came into power, he upgraded the code and he said he was going to have higher standards in public office. Today those words ring hollow - he has just torn up the code.
"Even if David Cameron thinks it is acceptable for a minister to break the code he drew up, we do not and will call a vote."
