Complex sentence: He did not seek election again until the 1924 general election, when he stood as a Constitutionalist candidate in the Burslem constituency, but narrowly lost the two-way contest to his Labour Party opponent Andrew MacLaren.
Split into simpler sentences: He did not seek election again until the 1924 general election, when he stood as a Constitutionalist candidate in the Burslem constituency. Allen narrowly lost the two-way contest to his Labour Party opponent Andrew MacLaren.