404 Titan:
Are you sure about lack of protection of ILS sensitive areas? This from MATS (Manual of Air Traffic Services):
2.6.1.1 Multipath effects on ILS facilities may be caused by an aircraft of particular size passing in front of the glide path antenna or operating in close proximity to the localiser antenna. These effects consist of signal fluctuations of the glide path or localiser.
Traffic restrictions in certain MET conditions
2.6.1.2 When meteorological conditions are observed as cloud BKN or OVC at or below 600 FT and / or visibility at or below 2,000 M the following restrictions shall apply to airport traffic:
a. when an aircraft is executing an ILS and is between the OM and the landing threshold or, if the OM is not available, between 4 NM final and the landing threshold:
1. fixed wing aircraft of performance category C or above and all rotary wing aircraft shall be held clear of the glide path critical area;
2. all aircraft shall be held clear of an area which will affect the localiser.
2.6.1.3 The glide path critical area to be protected is a volume of airspace encompassing the lateral dimensions of the defined critical area (see diagram below) from ground level up to a height of 100 FT.
The book goes on to diagramatically describe the glidepath and localiser critical areas.