The Paddington South by-election of 1930 was held on 30 October 1930. The by-election was held due to the death of the incumbent Conservative MP, Commodore Douglas King. It was won by the Empire Free Trade Crusade candidate Ernest Augustus Taylor.
On Wednesday 20 August 1930, King's cutter yacht Islander sank in a gale near Fowey, Cornwall. All six aboard, including King himself, were lost. The South Paddington Conservative Association turned to its usual supply of candidates, the representatives of the constituency on the London County Council, and invited the 66-year-old Sir Herbert Lidiard (Chairman of the Association for the previous 16 years) to be their candidate, an invitation which Lidiard accepted after some reluctance. The Labour Party entered the contest with Dorothy Evans, Secretary of the Association of Women Clerks and Secretaries.
Interest was however already aroused at the prospect of the United Empire Party of Viscount Rothermere contesting the byelection. One constituent wrote to The Times to report that he had been canvassed by the party. On 15 September, the party announced that Mrs Nell Stewart-Richardson would be its candidate. At this stage it also seemed likely that there would be a Liberal candidate, although the local association quickly announced that it did not intend to sponsor anyone.
Meanwhile the Empire Free Trade Crusade, normally allied with the United Empire Party but failing on this occasion due to Lord Beaverbrook's dislike of Mrs Stewart-Richardson, met with Sir Herbert Lidiard who pledged his support for Empire Free Trade but refused to go into Parliament with his hands tied. The Empire Crusaders then resolved to request the Conservative Association to choose a different candidate. When Lidiard declared that he would break the whip to vote in favour of Empire Free Trade, a statement welcomed by Beaverbrook, Neville Chamberlain wrote to him asking for clarification; Lidiard replied stating that he took this position in order to preserve the unity of his local association. In consequence, official Conservative endorsement was withdrawn on 30 September.