 In 1923, Leah L'Estrange Malone became the organisation's first female chair.By 1928, the World Union of Poale Zion claimed to have 1,000 members in the United Kingdom.World PZ leader Dov Hoz was based in the UK in 1928, and set about reviving and re-organising Poale Zion (Great Britain), including inspiring PZ members to become more active in the mainstream Labour Party.