 An advantage of this system, at least from the point of view of politicians, is that it enabled different sections of a party or allied groups to work together in the same constituency.In the early and mid-19th century it was quite common for liberals in an area with two seats to support the (left wing) liberal Radical candidate and the (right wing) liberal Whig nominee.Similarly in the early 20th century the Liberal Party and Labour Party found it expedient to pre-agree to field one candidate each in each such seat (unless a sure victory was anticipated for two like-party candidates); their main opponents being the Conservative Party in most areas.