Parliamentary Privilege Act, 1770

But the persons of members of the House of Commons not to be arrested or imprisoned.

2. Provided nevertheless, . . . that nothing in this Act shall extend to subject the person of any of the knights, citizens, and burgesses, or the commissioners of shires and burghs of the House of Commons of Great Britain for the time being, to be arrested or imprisoned upon any such suit or proceedings.

[Ss. 3, 4 rep. 42 & 43 Vict. c. 59.]