UK Parliament — House of Commons

A business sub-committee shall consist of the chair or one of the chairs of the committee (who shall be chair of the sub-committee) and seven members of the committee, to be nominated by the Speaker as soon as may be after such an order has been made; the quorum of the sub-committee shall be four, of whom the chair so nominated shall be one; and the sub-committee shall have power to report from time to time to the committee.

As soon as may be after an allocation of time order relating to a bill committed to a standing committee has been made, Mr. Speaker shall nominate the chairman of the standing committee in respect of that bill and seven members of the standing committee as constituted in respect of that bill to be members of the business sub-committee to consider that order, and those members shall be discharged from the sub-committee when that bill has been reported to the House by the standing committee; the chairman of the committee shall be the chairman of the sub-committee; the quorum of the sub-committee shall be four; and the sub-committee shall have power to report from time to time to the standing committee.