In recent months, dozens of local Labour parties have passed motions calling for Proportional Representation. With more than 80 Labour MPs in favour and new support among trade unions, there is more demand for fair votes than any time since the 1990s.
But will PR make it into Labour's next manifesto? Join Make Votes Matter, the Labour Campaign for Electoral Reform and our panel of speakers from across the Labour movement to find out what you can do to make sure Labour finally backs fair votes.
Mary Honeyball MEP
Jonathan Reynolds MP
Stephen Twigg MP (chair)
Chris Williamson MP
Tulip Siddiq MP
Paul Blomfield MP
The rally will be followed by a drinks reception where you can speak to activists from the campaign about how to advocate PR within the Labour Party.