below the gangway
(UK politics) On the benches in the House of Commons located past the central aisle and relatively far from the Speaker, generally occupied by minority groups not belonging to either the government or the Shadow Cabinet.
These people in the North-East of Ireland, from old prejudices perhaps more than from anything else, from the whole of their past history, would prefer, I believe, to accept the government of a foreign country rather than submit to be governed by hon. Gentlemen below the Gangway. Bonar Law