A data breach has exposed the locations of over 53,000 members of Jeremy Corbyn's Your Party, after a member posted a constituency breakdown online. The leak, which was visible for six hours, has intensified internal disputes within the party, with concerns raised about possible access to individual member profiles and the implications for upcoming leadership elections. The data reveals that Islington North, Corbyn's own seat, has the highest concentration of members, while some constituencies have only a handful. This incident comes amid ongoing infighting and controversy following the party's inaugural conference, where factional tensions and disputes over expulsions and policy positions dominated proceedings.