Staff at an Ammanford factory have reportedly been left in tears after being told not to speak Welsh at work.

According to a report by Welsh Language Commissioner, Aled Roberts, it had caused upset for some employees at car seat factory Pullmaflex.

In his report, Mr Roberts claims the Parc Amanwy business, which employs 230 staff, had asked Welsh speakers to avoid using the Welsh language with each other within working hours.

He said a number of people working at the site are Welsh speakers, and it is natural that they speak Welsh with each other at work.

It caused anger and upset amongst staff leading to two employees contacting the Welsh Language Commissioner, who called for a full statutory investigation.

Having considered the case, the Commissioner determined that Leggett & Platt Automotive had "interfered with the freedom to use Welsh".

Mr Roberts, said: “The instruction to use English caused them to feel angry and nervous about using the language."

The company's manager James Handyman has told the BBC that it had apologised to staff after hearing that it caused upset and that the request had been made because of health and safety reasons and concerns relating to Eastern European workers in the factory.

"It didn't occur to us it would create any offence to our Welsh speaking staff. When it became apparent, we issued an apology," Mr Handyman said.

While there is no financial penalty for private companies, the commissioner has instructed the firm to adopt a number of recommendations, including stating in a policy document that it "will not interfere with individuals' freedom to use the Welsh language".