Labour's '£20 billion black hole' strategy

The Chancellor Rachel Reeves is expected to give a statement to Parliament on Monday outlining the state of public finances, including a '£20 billion black hole'. James Heale talks to Katy Balls and Kate Andrews about the strategy behind this: will this speech lay the ground work for the Autumn budget? How new are these economic issues? And, with the Conservatives embarking on a long leadership election, will Labour have a free rein for their plans?  Produced by Patrick Gibbons.