Name all the mountain ranges in the UK and its overseas territories.
A mountain range has 2 or more mountains.
That means that for instance, Green Mountain on Ascension island (or St. Helena, Ascension and Tristan da Cunha) or Snaefell on the Isle of man are not mountain ranges because it is a standalone mountain.
I did think about adding the cairngorms but I decided that it was an area in the Grampian mts. a bit like the dolomites in the alpes. Sorry. Being as lots of people try the cairngorms, I'll add it as a type-in for the grampian mts.