Labour candidate Tulip Siddiq has won the constituency of Hampstead and Kilburn, holding it for the party following the retirement of Oscar-winning actress Glenda Jackson.
Ms Siddiq recorded a majority of 1,138 – the seat had previously been the second tightest in the country after Ms Jackson won by just 42 votes five years ago.
Jewish Conservative candidate Simon Marcus finished second, with 22,839 votes to Ms Siddiq’s 23,977.
Maajid Nawaz, a former Hizb ut-Tahrir member turned anti-extremism campaigner stood for the Liberal Democrats and finished third with 3,039.