Vince Cable yesterday said there was “a big case to answer” about whether Rupert Murdoch is fit and proper to keep his stake in broadcaster BSkyB. In an interview with the Evening Standard, the business secretary also revealed for the first time that he considered resigning from Cabinet during the furore when he said he was “at war” with the media tycoon. “I certainly felt rather low at the time because I was heavily criticised,” he said. “And I had broken the strict procedures that I could not discuss this (the BSkyB takeover bid) with other people, even though I thought it was a private conversation. So it was very awkward and there were queues of journalists outside my house for days on end. “But I was persuaded to stick in there by family and various colleagues and I’m glad I did.” The furore broke when the Daily Telegraph secretly taped him telling an undercover reporter whom he thought was a Twickenham constituent, “I have declared war on Mr Murdoch and I think we are going to win”. Cable was at the time in charge of media regulation, including the £8?billion BSkyB bid. He was humiliatingly rebuked by David Cameron and responsibility for media policy plus some 60 civil servants were all handed to Culture Secretary Jeremy Hunt.Today, however, Mr Cable feels vindicated.