Of all the cultural differences associated with international travel I didn’t expect bedding to be so different from continent to continent .
In U.K. sheets and blankets were used by our grandparents/ great grandparents in times past . They were replaced by duvets starting in 1960s duvets when were introduced by Sir Terrance Conran and sold in his shop Habitat. He imported them from Sweden and advertised them as the” 10 second bed” because of the ease in which a bed can be made with a duvet rather than sheets and blankets . Since then they have been the most popular bedding for most people in U.K.
(I don’t know when the TOg rating was introduced)
If you visited a home with sheets and blankets in U.K. it would generally be considered as very old fashioned.