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Darren Jones, chief secretary to the Treasury, said the government would "never play fast and loose with the public finances" and reiterated that the rules on borrowing were "non-negotiable".

For some people, ham is a non-negotiable centerpiece of the holiday tablescape.

"I don't want people talking about the fitness of the England women's cricket team. Fitness is a non-negotiable. We should be fit."

Chancellor Rachel Reeves has set out her plans for the UK economy in her Spring Statement and is on track to meet her self-imposed rules on the public finances, which she has said are "non-negotiable".

Rachel Reeves made it clear in her Spring Statement that her rules – which she tweaked at the Budget – were "non-negotiable".