The chancellor faces her toughest challenge yet in a Budget that will define the government's future, writes Laura Kuenssberg.

Can you pull the levers of power to deliver a successful budget? Can you keep backbenchers happy without upsetting the bond markets? And can you do it all while keeping the books…

From the outside, the run-up to Rachel Reeves’s announcement has looked chaotic, and many see the future of the chancellor and PM in the balance