The North Western Reform Synagogue, commonly known as Alyth,[a] is a Reform Jewish congregation and synagogue, located at Temple Fortune, Golders Green, in the Borough of Barnet, north-west London, England, in the United Kingdom.

Its building, designed by the architect Fritz Landauer,[2] was built in Alyth Gardens in 1936, on land carved out from the West London Synagogue’s cemetery in Hoop Lane.

[3] In 1942, the congregation became a founding member of Associated British Synagogue, now known as the Movement for Reform Judaism.

[4] With approximately 2,500 adult and 1,000 child members, the congregation is one of the largest Reform synagogues in the United Kingdom.

[citation needed] In 2021 its members approved a £6 million upgrade to the synagogue building,[5] which is scheduled to be completed in 2024.