within 19 votes of winning the seat. In 2018, the Conservatives held one seat and lost two to Labour in Clapham Common by a very narrow margin, whilst the Greens took the other two seats from Labour in St Leonard's. Political history Streatham was for a few decades solidly Tory suburbia overall: the Conservatives won Streatham when Labour gained large majorities in 1945 and 1966, and it was the only seat in the former LCC area (Inner London) apart from the Chelsea/Kensington/Westminster/City central core to remain consistently Conservative. More recently, demographic and voting pattern changes combined with unfavourable boundary changes converted Streatham into a marginal seat, then into a mid-ranking safe Labour seat. Streatham has modestly swung against the Conservative Party since the 1980s, even more than other similar seats in South London (such as Croydon North, Dulwich and West Norwood, Lewisham East and West). The Conservative Party lost Streatham in 1992, having held it since 1918. The Conservative candidate was beaten into third place by a Liberal Democrat in 2001, and there were swings from Labour to the Liberal Democrats at the two subsequent general elections. In 2010, when the Labour incumbent, Keith Hill, retired and Chuka Umunna stood for the party, there was a serious Liberal Democrat campaign resulting in their best showing to date in the seat, but there was also a marginal increase in the Conservative vote share and Umunna was elected. The 2015 result was the re-election of Umunna, which made the seat the 96th safest of Labour's 232 seats by percentage of majority. In 2015 the Conservatives moved into second place with a sharp increase in numerical vote share, and remained there in 2017. However, in 2019, they reverted to third place behind the Liberal Democrats. Historic boundaries The constituency of Streatham was contested under this name at the 1918 general election, when it approximately followed the historic parish boundaries of Streatham, including a substantial part of Balham, a 19th-century founded and primarily urban parish by that time. The constituency was carved out of the former constituency of Wandsworth in the same way as Putney, Wandsworth Central and Balham and Tooting under the Representation of the People Act 1918, the fourth major UK reform, that settled upon single member constituencies, and roughly equal electorates. The 1918 boundaries remained unchanged until the 1965 changes to Greater London local government became reflected in the parliamentary constituencies,