As I was trying to get to sleep last night, I realized my way of deciding whether any desired activation spot is in the AZ or not using the Muncaster case, was a bit faulty.
You have to ask, could I have walked here from the summit without dropping more than 25m in height? So, start with the summit height [let’s take the Muncaster Fell case, 232m] then look on the map for, or imagine, an encircling contour line 25m below it [at 207m ASL in this case]. I used the 200m contour line [as shown on the OS Map] for my calculation above whereas the 207m line [probably not shown on any map] is the one to use.
In walking from the new Muncaster SOTA summit to the old one you don’t have to cross the 200m line [as I implied] but you definitely have to go below the 220m and 210m contours [and cross them again going up to the old summit]. So, you drop at least 22m. And I suppose you must be losing at least another 3m in height somewhere in the middle near Hooker Moss – thereby leaving the AZ.
The moral of the story is – unless you can or want to pour over detailed maps before or during your activation - don’t stray very far from the summit.