The by-election was caused by the death of the sitting LiberalMP, Sir Joseph Pease on 23 June 1903 at the age of 75. Pease had been MP for Barnard Castle since the 1885 general election, and before that one of the two MPs for South Durham since 1865.
William Lyonel Vane was the Unionist candidate. Vane had fought the seat as the Unionist candidate in the 1895 and 1900 elections. losing on both occasions in straight fights against Pease. He was 43 years old and was a colonel in the 6th Battalion, Durham Light Infantry.
The Friendly Society of Iron Founders agreed to sponsor a Labour Representation Committee candidate. Arthur Henderson was selected, receiving 5,619 votes from their membership, defeating Robert Morley, who took only 1,411.[1] Henderson was one of the delegates to the founding conference of the LRC in 1900, and had been elected Mayor of Darlington earlier in 1903. He had previously worked as agent for Pease, and was also 39 years old.
Result
A crowd of 3,000 gathered in the market place at Barnard Castle on Saturday 26 July to hear that Henderson had beaten Vane by 47 votes, with Beaumont in third place.[2]
Henderson would remain as MP for the division until 1918, when he instead fought, and lost, the southern division of East Ham. He would serve three times as Leader of the Labour Party, and as both Home and Foreign Secretary, as well as winning by-elections in four other constituencies.
References
^David E. Martin, "Morley, Robert", Dictionary of Labour Biography, vol. IX, pp. 225–227