I was trying to lookup the definition of "aerodrome boundary"
in CAP 168 Ch1 Page 3 5.3 it says:
... the aerodrome licence should show the boundary of
the area of the aerodrome set aside for the movement of aircraft requiring the use of
a licensed aerodrome, so should include runways, taxiways, aprons and, in most
cases, the area adjacent to the terminal building. This is the area that will be audited
by Aerodrome Standards Inspectors, and is also the boundary of the area referred to
in Condition 3 of the aerodrome licence.
This is the only definition I have found and matches the example maps later in the document.
That would mean that in most aerodromes the control tower would be outside the legal definition of aerodrome boundary. Nowhere in the document does it say that the control tower must be inside the boundary.
I know this doesn't make sense (ATC doesn't run down to a box beside the runway at Heathrow and throw a switch) but what am I missing?