The West London Synagogue, abbreviated WLS, and fully the West London Synagogue of British Jews (Hebrew: ק"ק שער ציון, romanized: Kahal Kadosh Sha'ar Tziyon, lit.

[4] On 15 April 1840, 24 members of the Mocatta, Goldsmid and other families announced their secession from their respective congregations, the Sephardi Bevis Marks Synagogue and the Ashkenazi Great Synagogue of London, and their intention to form a prayer group for neither "German nor Portuguese" Jews but for "British Jews", which would allow them to worship together.

The new prayer group, convening in Burton Street, hired Reverend David Woolf Marks in March 1841.

Marks and the congregation adopted a unique, bibliocentric approach often termed "neo-Karaism" by their critics, largely rejecting the authority of the Oral Torah.

On 27 January 1842, the West London Synagogue of British Jews was consecrated in its first permanent building, at Burton Street Chapel.

Eventually, the current synagogue building in Upper Berkeley Street was opened on 22 September 1870.

His successor, Rabbi Morris Joseph, abandoned his predecessor's philosophy, which was never very popular with constituents, and brought West London closer to mainstream Reform by removing from the liturgy its petitions for the restoration of sacrifices in Jerusalem.

A choir and organ, located behind a screen to the rear of the bimah, accompany the congregation in all musical parts of the service except for the aleinu and the Kaddish.