I reckon they are Scandinavian, made for Woolies and imported for them by J.W Wuidart. John Wuidart employed both RSW and Frank Thrower to source glass from some of the smaller Scandinavian factories for import into the UK. I believe both Reducta and Edward Bowman did the same.
Of course John, who was a real charmer who went onto become the agent for Waterford as WaterfordWuidart, and bet the MD of Waterford that within 5 years he could sell £1m in the UK.
He won his bet and was bought a Jaguar XJ6 ! I have a photo of him with a hot actress of the time Suzy Kendall and him lounging on the bonnet drinking champagne out of Waterford flutes and a couple of Waterford Directors alongside! the photo is from Pottery and Glass gazette of circa 1965?
John lived in Welwyn and was a real glass buccaneer. He imported some Portuguese tankards for Guinness, until the quality become "iffy" and we at Nazeing Glass, were asked to make some,half pint and 1 pint.