Cardiff University researchers find some Welsh accents are being replaced by a more uniform one.

Do you say Ssebra or Bee-ur? While the stereotypical Welsh accent is easy to recognise from television sitcoms, experts will soon find out the whole range of dialects that the nation has to offer.

Union officials say the aim is to limit speaking time for staff - recommended by the Health and Safety Executive for good call centre practice. But the ban on bilingualism has been branded "absurd".