While originally devised by the Boundary Commissioners in 1885, the division was originally named as 'Birstal', "from the name of a large ancient parish". The naming of the new division led to a small struggle between the two Houses of Parliament during the passage of the Redistribution of Seats Act 1885, when Alfred Illingworth (Liberal MP for Bradford) moved an amendment to replace 'Birstal' with 'Spen Valley'. Illingworth argued that Birstall contained only one-eighth of the population of the division, but Spen Valley was a name which represented several important towns, and his amendment was accepted without dissent by the House of Commons. When the Bill reached the House of Lords, the Conservative peer the Earl of Feversham moved an amendment to reinstate 'Birstal' claiming the support of the people in the area. The Earl contended that the Spen Valley was an unknown description and "was only remarkable for being the receptacle of all the sewage from Birstal", whereas Birstal was a very important parish. He had support from the Earl of Cranbrook and his amendment was also accepted without dissent.