The figures relate to five-year-olds with any enamel and/or dentinal decay and show that 37 of children in the most deprived areas are affected.

UK Steel director-general Gareth Stace said: “President Trump has taken a sledgehammer to free trade, with huge ramifications for the steel sector in the UK and across the world.

The UK is said to have followed the US in not signing a declaration from leaders on agreed practices around AI development.