TD, as far as modern response times go, and perhaps also my memory, you will be better placed to say what the modern times are. 30 years ago we lived in the mess at, IIRC, 60 minutes.
If the response time has relaxed to 2 hours it follows that airborne SAR actually provides a better response time albeit a shorter on task time. IF there is a serviceable ground SAR then they can do a considered planned launch rather than a scramble.
This used to happen from time to time.
As for Inverness to airborne in one hour, that would probably be quite possible.
I lived in Nairn and we used to hold QRA at Lossiemouth at 2 hours and sometimes 90 minutes. From Nairn to Lossie was 30 miles and I expected to be airborne on a scramble within 50-55 minutes.