WorkingHard...
The North of Scotland is very sparsely populated - because not many people want to live there. There are few jobs for wives/husbands and not many schools - hence quality of life for our families, if we were based there, would not be great.
If we just deployed there to do the exceptionally frequent training that would be required it would mean even more time away from our currently very pissed off families.
The Army (who SH generally work closely with) are mainly based in the south (Salisbury/Wilton/London/Hereford) so to work effectively with them we need to be based reasonably close.
Those who earn the most are benefiting most from the freedom won and maintained by the armed forces, why the f**k shouldn't they put up with a little helicopter noise from LL ac once in a while?