rich 1.0 Action Network https://actionnetwork.org <link href='https://actionnetwork.org/css/style-embed-v3.css' rel='stylesheet' type='text/css' /><script src='https://actionnetwork.org/widgets/v6/event/mainstreams-2026-conference-rally-and-party?format=js&source=widget'></script><div id='can-event-area-mainstreams-2026-conference-rally-and-party' style='width: 100%'><!-- this div is the target for our HTML insertion --></div> Mainstream https://actionnetwork.org/groups/mainstreamlabour https://can2-prod.s3.amazonaws.com/events/photos/003/234/558/normal/Title_(25).png Join Mainstream and radical realists from across the UK to celebrate a year of building power and ideas within Labour for transformative change. Hear from allies across the Labour Party and wider movement, connect with fellow organisers, and be part of the network shaping Labour’s future at Mainstream's 2026 Conference Rally and Party. https://actionnetwork.org/events/mainstreams-2026-conference-rally-and-party