UK Parliament — House of Commons

Twenty days shall be allotted in each session for proceedings on opposition business, seventeen of which shall be at the disposal of the Leader of the Opposition and three of which shall be at the disposal of the leader of the second largest opposition party; and matters selected on those days shall have precedence over government business provided that-

Nineteen allotted days in each session shall be at the disposal of the Leader of Her Majesty's Opposition and matters selected on these days shall have precedence over government business provided that-