That was Change UK (abbreviated to CUK lol) who are basically the same as the LibDems. They first ran for European elections and fell flat on their face, winning no seats and 3% of the total vote. The MPs that left Labour all lost their seats in the following GE. Also IIRC thdy left the party between the European elections and the GE, notable one is Chuka Umunna who ended up joining the LibDems. Also change.org threatened to sue them so great idea overall.
That was Change UK (abbreviated to CUK lol) who are basically the same as the LibDems. They first ran for European elections and fell flat on their face, winning no seats and 3% of the total vote. The MPs that left Labour all lost their seats in the following GE. Also IIRC thdy left the party between the European elections and the GE, notable one is Chuka Umunna who ended up joining the LibDems. Also change.org threatened to sue them so great idea overall.