In the House of Commons there are three Grand Committees, one each for Scotland, Wales and Northern Ireland. They each consist of all MPs who represent constituencies in that part of the country together some additional members and deal with questions to ministers, short debates, ministerial statements, the consideration of Bills before their second or third readings and other legislative proposals.
In the House of Lords a Grand Committee has an unlimited membership and considers the committee stage of a Bill away from the Floor of the House. Any Bill may be sent to a Grand Committee and the proceedings are identical to those in a Committee of the Whole House except that no votes may take place.
Further information on this subject can be found from the following links.
About Parliament: Committees
Committees: A - Z Index