PM set to warn: ‘Things will get worse’ before improving

Sir Keir will also address the condition of the wider public sector, saying those taking part in the recent riots had been able to exploit “the cracks in our society after 14 years of populism and failure”, including a lack of prison places.

Arguing change will not happen “overnight”, the PM is also expected to say Labour has achieved “more in seven weeks than the last government did in seven years”.

He will use examples including setting up a National Wealth Fund, changing planning policy to build more homes and ending public sector strikes.

Sir Keir’s speech comes ahead of a potentially tough period for the government as it prepares its first Budget, due on 30 October.

Ms Reeves faces the challenge of delivering on Labour’s promises on taxation and spending amid what she has already described as a worse fiscal situation than she was expecting, with some tax rises looking increasingly likely.