Billionaire businessman Sir James Dyson has issued fresh criticism of the prime minister, claiming his pledge to turn the UK into a science and technology superpower is a "mere political slogan".

The founder and chief engineer of the multinational technology company Dyson also complained - in a letter to The Times - that he has still not met Rishi Sunak, despite being a major entrepreneur in the UK.

"Ministers talk hubristically of Britain becoming a 'science and technology superpower' but their woeful policies diminish this to a mere political slogan," he wrote.

"In the UK, Dyson now faces rocketing corporation tax (wiping out any tax credits for research and development)... and a crippling shortage of qualified engineers."

Mr Sunak's ambition of turning the UK into a science superpower post-Brexit has been central to his premiership. A key part of this was the creation of a new Department for Science, Innovation and Technology.

In January, Sir James accused the government of having a "short-sighted" approach to business, warning the prime minister that growth should not be seen as a "dirty word".

A government spokesperson said that the UK is open for business as an "innovation nation".

"We boast the biggest tech sector in Europe, reaching a combined market value of £1trn in 2022, we have the lowest corporation tax rate in the G7, and we have world-leading strengths in science and R&D - backed by our £20bn R&D target and introduction of policies like full-expensing," they said.

"This will spur stronger growth, better jobs and bold new discoveries, bringing together the key technologies of tomorrow like quantum and AI, into a dedicated Department for Science, Innovation and Technology for the first time."

During Jeremy Hunt's autumn budget, the UK's science and technology sector survived a much feared spending cut - but those in the field warned that the government will need to do more to realise the UK's potential as a "science superpower".