The Assistant Commissioner of the Metropolitan Police, John Yates, has been recalled to appear before the Home Affairs select committee on Tuesday over the phone hacking scandal.
Yates appeared last week before the same committee, where he defended his role in relation to a previous inquiry into phone hacking at News International, which failed to uncover evidence of the practice.
Keith Vaz, the chairman of the Home Affairs select committee, told The Daily Telegraph that Yates had been recalled to give evidence following his appearance last week. He added that he would also be quizzed on a number of activities that led to the resignation of Sir Paul Stephenson, the Commissioner of the Metropolitan police.
Pressure is mounting on Yates to resign, with independent member of the Metropolitan Police Authority (MPA) Chris Boothman, Lord Prescott and Shadow Culture Secretary Ivan Lewis calling for him to step down.
"I struggle to see how he can continue if the commissioner has resigned. My personal view is that he should follow the commissioner's example," Boothman told the BBC.
The MPA discussed the situation Yates on Monday, and Boris Johnson, the London mayor, said there would be "questions surrounding other officers".
Speaking to BBC Radio 4, Johnson also said that he was "very, very angry" that City Hall was not told about the Metropolitan Police's employment of Neil Wallis, the former-News of The World executive arrested last week.
"Clearly there are now questions about [Yates'] relationship with Wallis and all the rest of it and I'm sure that the MPA is going to be having a look at it."
But he said there was a "real sense of disappointment in City Hall" over the resignation of Sir Paul Stephenson, the Metropolitan Police Commissioner, and that he felt personally "hacked off" when the relationship between Wallis and the Met was revealed.
He said that he and Stephenson had discussed police corruption several weeks ago, and said that at the time he felt the issue was "the dog that hadn't barked".
Stephenson resigned on Sunday, just hours after Rebekah Brooks, former News International chief executive, was arrested in connection to investigations into allegations of phone hacking and corruption at the company.
However her lawyer Stephen Parkinson said on Monday that Brooks still intended to appear before a Commons culture select committee on Tuesday, alongside Rupert Murdoch, the News Corp chairman, and his son James.
He added that his client was "not guilty of any criminal offence".
"The position of the Metropolitan Police is less easy to understand. Despite arresting her yesterday and conducting an interview process lasting nine hours, they put no allegations to her, and showed her no documents connecting her with any crime," he told reporters on Monday.
"They will in due course have to give an account of their actions, and in particular their decision to arrest her, with the enormous reputational damage that this has involved."