St Ivel is a brand of dairy products in the United Kingdom. It began as a subsidiary under the ownership of the Unigate dairy company with most production sites in the south west of England and some in Wales. Most of its brands were bought in the early 2000s by Dairy Crest following a severe decline in doorstep deliveries of milk – previously a major area of business for owners Unigate.
Info gleaned from Wikipedia
Visit Wales commercial from 1981.
Wales is a country that is part of the United Kingdom, bordered by England to its east, and the Atlantic Ocean and Irish Sea to its west. It is also an elective region of the European Union. Wales has a population estimated at three million and is officially bilingual, with both Welsh and English having equal status.