The man in charge of pronunciation for the Oxford English Dictionary is a Brummie.

The BBC's Kevin Bocquet: "Her remarks have done little for her popularity"

Now there's something for Beryl Bainbridge to get her dipthongs in a twist about.

Gently-accented Professor Clive Upton, of Leeds University, says the Liverpool-born novelist's recent comments "fly in the face of common sense".

Not content with scooping the WHSmith literary award for her novel Master Georgie, the 64-year-old railed against regional accents as she picked up her �10,000 prize.

Beryl Bainbridge: Wants regional accents to be "wiped out"

Reserving a special dose of vitriol for the Liverpool twang she professes to "hate", she recommended that children be forced to take elocution lessons, to "wipe out" their accents.

Her scornful voice is not a lonely one. Research has shown that while a person may look smart and presentable, and be qualified up to the eyeballs, speaking with a Birmingham or Liverpool accent will make them less acceptible to potential employers.

And woe betide Brummies protesting their innocence.

Psychologists in 1997 conducted tests which suggested inhabitants of the UK's second city were twice as likely to be perceived as guilty of crime - purely on the strength of their accent.

"Diversity in regional accents is like diversity in cuisine or clothing," says Michael Tooley, professor of applied English linguistics at Birmingham University.

"To reduce the wealth of this country's accent diversity to a uniform received English would make for a sterile and poorer culture."

Mr Upton agrees. "What we say is who we are. We are talking about our identities when we talk about our accents."

Accent, he says, is not only an indicator of regional provenance, but a communication tool in itself.

"We accommodate other people's accents as we talk, and that sends subtle social signals to the person we are talking to.

Birmingham accents are ridiculed by advertising types

"That is just one aspect of human interaction that would be lost by forcing everyone to use received pronunciation.

"The other thing is that it is a very 'Little Englander' thing to say. There are 60 million English speakers in this country - but there are 1.5 billion speakers of English worldwide."

Yet gut prejudice over regional accent prevails.

A few words about quick brown foxes, or putting one's foot in a butcher's bucket, still provide enough raw data to wedge any given speaker firmly into a stereotyped slot.

Marketing types love to cash in on prejudices against regional accents.

"Why is it that Coleman's can give a big fat pig a Birmingham accent?" asks Mr Upton.

The BBC's Adrian Chiles flies the Brummie flag on Business Breakfast

Indeed why is it that anybody dull, stupid or unambitious has a Birmingham accent in ad land?

Or that the light-fingered are inevitably portrayed as Liverpudlians?

Mr Tooley says some attitudes stem from history.

While the monied hob-nobbed around cosmopolitan London, the Black Country got grimy producing the country's wealth, and perhaps as a consequence, its citizens were regarded as dull.

Mr Upton is more direct: "It's because there are Beryl Bainbridges around perpetuating the idea that RP is a superior accent. RP is in fact very much an upstart accent."

But regional accents can do their speakers favours. Irish accents, for example, as well as softly-spoken Scottish accents, are perceived as reliable and dependable.

According to separate research in 1997, a Celtic burr is an absolute winner on the job-seeking front.

The danger, said Mr Upton, is that people might feel obliged to lose their accents rather than their prejudices.

The nature of language, and of accents, is for them to change, he said.

Senior Lecturer of Modern Languages at the University of Kent, Paul Coggle, described how Estuary English had now spread to most of South-East England.

"It is a normal thing for accents to do," he said. "You would really be wasting your time in any attempt to steer accents and make everyone speak the same way."

Some of the snobbery surrounding language use and accents has disappeared.

Mastering the clipped tones of upper middle class English was a crucial career move for ITN's Trevor McDonald.

But younger presenters including the BBC's Brummie Adrian Chiles and Welsh Huw Edwards have not had to go all Chumley -Warner to get ahead in the game. Edwards is soon to take over as the main presenter of BBC One's Six O'Clock News.

The OED is now expanding the range of pronunciation it encompasses as RP. A north-of-the-Watford-Gap bath is equally acceptable as a southern "barth".