Some possible contenders for a visit in this area http://www.geograph.org.uk/gridref/NR3676. Have a search around on the sight in adjacent grid squares too as some other possible spots by the look of it.
Have a good trip Dave. I'll also be fishing, specifically on the fly for sea trout. My annual shot at tempting one of the wee beasties!
with a beard.
Climb magazine last year had an article by John Watson on 'Secret British Blocs' in Scotland (downloadable for free from their website) which mentioned Sanaigmore in the northwest of the island. It might be worth a look.