‘Your Party’ is either an interim name or just the working group name, not totally clear which. Anyway, thought it would be of interest.
EDIT: Yeah, it’s not registered with the Electoral Commission, so it’s not yet a political party, but it’s run by the Peace and Justice Project, which is Corbyn’s existing vehicle.
Party McPartyface it is then.
They really should just formalise Momentum as a party, tell the Momentum-affiliated Labour MPs to jump or be pushed, and use Momentum as the name. Already has recognition, for one thing.