Sir Percy Alfred Harris, 1st Baronet, PC (6 March 1876 – 28 June 1952) was a British Liberal Party politician.Percy Harris was regarded as a radical Liberal with a strong social conscience, which grew from representing a working-class area of the East End of London.He was not expected to win and in an election that saw the Liberals sweep the country Harris came within 400 votes of toppling his Conservative opponent.He contested Bethnal Green South West alongside his running mate Stewart Headlam and they were both elected.In 1914, Harris was adopted as prospective Liberal candidate for the Harborough division of Leicestershire for the general election expected to take place either in 1914 or 1915.Harris was re-adopted by the local Liberals and his candidacy was also officially endorsed by both the Unionist and Labour parties, due to the wartime electoral truce.[7]: 40–41 The split with the Harborough Liberals gave Harris the freedom to pursue a parliamentary career in Bethnal Green South West, the seat he represented on the LCC.At the 1922 general election, Harris faced the Unionist MP who had taken the seat from the Liberals in 1914 and a Communist who had Labour Party support.During the 1924–29 parliament which was dominated by a Unionist majority, Harris worked closely with a group of radical Liberal MPs that included William Wedgwood Benn, Frank Briant, Joseph Kenworthy and Horace Crawfurd to provide opposition to the government.[9] Harris played a key role in the formation of Liberal International in 1947 and was President of the British Council of LI.In 1950, Harris sought a similar return to parliament for the new merged seat of Bethnal Green, but in a bad year for the Liberals, finished a distant second.