Movement for Reform Judaism

The Movement for Reform Judaism (MRJ), known as Reform Synagogues of Great Britain until 2005, was one of the two World Union for Progressive Judaism-affiliated denominations in the United Kingdom. In 2025, a vote confirmed that the Movement for Reform Judaism would unite with Liberal Judaism into one Progressive Judaism for the UK and Ireland.

It was originally larger and considered to be more traditional in comparison with Liberal Judaism, however differences between the two evaporated in the 21st century with Reform – previously seen as the more traditional – modernising, and Liberal Judaism re-adopting some discarded traditions. Both denominations came to very similar positions on principle and practice, "seeking to marry the traditions of the past with the realities of the present".

It was the second-largest Jewish religious group in the United Kingdom, with 19.4% of synagogue-member households. The new movement, Progressive Judaism, represents about 30 per cent of British Jewry who are affiliated to synagogues.