Quite right Will. Cloud is fog if you are standing with your
head in
it. Dartmoor probably does qualify as the foggiest area if you
count
the number of people living there. Not just the hill farmers.
Poor
sods. There is Princetown for a start at 2000 ft.
Len Wood

By that logic, Cairn Gorm wouldn't be the windiest place in
Britain. Nor would any mountain summit or lighthouse, come to
that. So where would be?

Also how would you do the calculation? Would 24 hours of fog on
Dartmoor count as less foggy than one minute of fog in London?
There are far more than 24x60 times the number of people in
London than there are on Dartmoor.

Anne