UK Parliament — House of Commons

If any select committee, or sub-committee thereof, considers that the presence at a meeting, or part of a meeting, of that committee to which the public are not admitted of any specified Member of the House not nominated to that committee would obstruct the business of the committee, it shall have power to direct such Member to withdraw forthwith; and the Serjeant at Arms shall act on such instructions as he may receive from the chairman of the committee in pursuance of this order.