Imports of chilled and frozen meat and fish, cheese and dairy products, and five common varieties of cut flowers will require an export health certificate, signed off by a European vet or plant inspector, before they can enter the UK.

The price of many fruits and vegetables on sale in the UK is predicted to rise again when new post-Brexit import controls are introduced later this year.

'Patience is wearing thin' with the UK on the Northern Ireland Brexit protocol, the European Commission's vice-president, Maroš Šefčovič, has warned, adding the EU could retaliate by suspending some cooperation and imposing tariffs.