This year's national conference of the Marxist Student Federation in London was the biggest and best yet. The mood was electric and enthusiastic, as student activists from across the country met to discuss the revolutionary events taking place across the world.

The ballot for the Labour leadership contest opens this week. Rebecca Long-Bailey and Richard Burgon are the clear candidates of the left for leader and deputy respectively. But to beat their right-wing rivals, they must mobilise grassroots members around bold socialist demands.