Thank you Eliza for your advice, however, I have also tried two sheets (King size) plus pillowcases and it still balls within seconds.
I tend to agree with Phoenix that the top end dryers, which cost a fortune, may be marginally better but maybe not enough to warrant their price. I bought the John Lewis Signature Hotpoint dryer which seemed the best of the middle end with a 9k drum thinking it would handle anything.
Never mind, I haven't given up yet and, as it seems to be a common problem with lots of brands of dryers, I will keep this dryer and put the little grey cells to work.
I am seldom beaten by inaminate objects, is this going to be the first?
When and if I make progress, I will shout out loud.