Where am I able to do my laundry in the Peak District?

I have traveled to the UK before and found coin operate launderettes as well as service laundries thin on the ground. Many local people use them for large items like blankets of bed quilts that won't fit into their washing machine. At a B&B in Aviemore I used their laundry but was asked not to use the tumble dryer as it cost them money to use. The laundry area was humid and damp with clothes hung everywhere but nothing drying. So I used the tumble dryer. I gave them 20 pounds and they still whinged and moaned that I'd used the tumble dryer. I refuse to wear damp cloths just to save a tight B&B owner a few quid.