OXFORD East's MP Anneliese Dodds said she was relieved rules were passed in Parliament so MINIs produced in Cowley could be sold abroad even if there is a no-deal Brexit.

Last week rules were passed so that if a no-deal Brexit is reached – either by the end of this month or later – EU-approved cars can be sold in the UK and UK-approved cars in the EU.

Ms Dodds said she had worked with BMW so MINIs could still be sold regardless of Brexit's eventual conclusion.

She said: "Type approval, known as 'homologation' in the trade, is essential to the automotive industry. Without type approval it is impossible for cars to be marketed in different jurisdictions."

Ms Dodds added: "This is a particular problem for those models which are highly customised.

"Every single MINI in the production line at the BMW Cowley factory, in my constituency, is produced for a specific customer and thus individualised from the beginning.

"Without type approval, it would not be possible for any of these cars to leave the factory for their new owners."

A BMW Group spokesman said: “We of course welcome the regulatory certainty that ‘type approval’ provides for MINIs built here in Oxford.”

A study by Sussex University's UK Trade Policy Observatory found tariffs after Brexit could mean dairy products could become 8.1 per cent more expensive.

Meat, oils, fats and vegetables would also be expected to rise, the research said.

Oxfordshire County Council, which is leading on councils' preparations for Brexit, said it expects the impact of it to be 'low'.

The UK is expected to leave the EU on March 29, but it could be delayed.

Cherwell was the only Oxfordshire district to vote to leave the EU when the referendum was held in June 2016.