Lord Tebbit has come under fire after suggesting he hoped Sinn Fein politician Martin McGuinness would be "shot in the back".
The former Conservative chairman, who was himself injured in the 1984 Brighton hotel bombing, suggested Mr McGuinness' presence yesterday at a state banquet with the Queen might anger hardline Republicans.
"There's always the possibility that a member of the Real IRA will be so outraged by Mr McGuinness bowing to the Queen that they might shoot him in the back for it. We can but hope," he said.
Sinn Fein leader Gerry Adams expressed outrage at the comments, saying:
"To publicly advocate the assassination of Deputy First Minister Martin McGuinness is a shocking throwback to a violent past from which we are seeking to move on."
Former Conservative chairman Lord Tebbit has become the most senior Conservative to call for Maria Miller to resign as Culture Secretary, amid controversy over her response to an investigation into her expenses claims.
Lord Tebbit said that the Culture Secretary's "arrogant" handling of the scandal had revived voter anger over MPs' expenses and undermined the Government's message that "we're all in it together".
"The best way out of this is for Mrs Miller to resign," he said.
His call came as Labour promised to reform Parliament's standards system in the wake of controversy over the decision of a panel of MPs to overrule a watchdog's judgment on Mrs Miller.
Lord Tebbit has blamed the rise in obesity on people who "stuff themselves silly" with food.
During question time in the House of Lords, the Tory former Cabinet minister criticised people for eating "rubbish" foods.
He told peers: "People ought to know that if they stuff themselves silly with high calorie rubbish foods they will get fat."
He also encouraged people to take more responsibility for what they eat.
In response the Health minister Earl Howe said: "You are absolutely right to place your finger on this central point that it is in the end up to individuals themselves to take responsibility for their own state of health."