Growing up in Manchester, Mia Tanswell didn’t give her accent much thought – until her first week at university in Loughborough.

“I knew people were going to notice that I was northern and that I didn’t speak the ‘Queen’s English’,” the 22-year-old says.

“Definitely in seminars I would sometimes feel like my accent would sound a bit less intellectual than other people, especially if I was the only northern student in the classroom.”

She’s not alone. Fresh polling seen by the BBC suggests many workers still see so-called “accent bias” as a problem.

The survey found one in 10 people in Britain feel anxious or self-conscious about their accent in high stakes professional settings such as speaking up in a business meeting.

The research, conducted by the organisation More in Common of more than 3,300 adults across England, Scotland and Wales, found accent-related anxiety in work settings like these was highest among Geordies – from the region around Newcastle – and those with an east London – or Cockney – accent (at 19%), followed by people with a Welsh accent (at 18%).

Around 5% of respondents believed their accent had cost them a promotion, pay rise or senior role. “Brummies” – people from Birmingham – were the most likely to feel this, at 13%.

Respondents with a West Country accent reported the highest rate of having their accent mocked or criticised by colleagues, at 15%, followed by 13% of those with a Geordie accent.

The poll was commissioned by Common Ground, an organisation which aims to promote social cohesion. Its founder, Lara Newman, has worked in construction, property and the built environment industry for more than 30 years, and says she changed her own accent to get ahead in the workplace.

“I am incredibly realistic about what would have happened had I gone to university or gone into the workplace with a strong west country accent,” she says. “I felt like that was going to be an issue for me.”

Common Ground aims to support people from disadvantaged backgrounds into work but she says one of the layers creating a barrier to them is accent.

“I think there is a problem in the sense that [an accent] implies a level of education or otherwise. It implies class,” she says.