Parliamentary boroughs are a type of administrative division, usually covering urban areas, that are entitled to representation in a Parliament. The term came into use in the 19th century in the United Kingdom, when certain boroughs were disenfranchised, becoming merely municipal boroughs.
The last few seats to be represented by two members in the 1945-50 parliament were
Three Northern Ireland county constituencies also had two seats at that time:
All these seats were split for the 1950 general election.
Some university constituencies had multiple seats until their abolition in 1950: