Helicopter on the Stray this morning

I don't know what it's doing here, but maybe it shouldn't be?

or maybe it's OK? Of course it's Royals, so we'd better not complain too much ....

Stray Act 1985:

"S.6 (d) not more than 12 temporary encroachments in any year for the setting aside of part of the Stray for the landing and take-off of aircraft capable of descending or climbing vertically provided that such aircraft shall not be engaged in the public transport of passengers for hire or reward"


I don't see any temporary encroachments apart from a couple of people in high viz jackets. Do they count as encroachments?

And I wonder how many times the Air Ambulance lands, and how it relates to this helicopter?