In reply to captain paranoia:
> Manchester? How do you say it?!
> Shit-hole
There'll be letters, Cap'n ...
Various sources indicate that 'Sca' was introduced by the the OS for what was previously spelled 'Scaw'. It seems the original spelling and usage was Scaw Fell (two words) for what is now Sca Fell; 'The Pikes of Scaw Fell' for what are now Scafell Pike, Ill Crag and Broad Crag.
IME most of the Wasdale locals pronounce the hills as Scaw Fell (two words) and Scawf'l Pike. Most outsiders pronounce them Scar Fell and Skaff'l Pike (with a short 'a'). If you are not a local, which one you choose is a matter of personal choice IMO - I prefer to go with the endonym.
Anyway, never mind the hills - is it Wazzdale or Wozzdale; Waztwater (short 'a') or Wostwater? And how do you pronounce Shrewsbury ?