Loch Garry Communications Installation, Project Cancelled?

The ELF (Extremely Low Frequency) facility in America, which became operational in 1989, was a means of communicating with a submerged submarine. Due to the wavelength being so low it uses the subsoil as the antenna.

In order for the UK to maintain it's independent nuclear deterrent, it would need a system independent of other governments.

UK ground based ELF transmitting antenna would need to be in areas with geological remnants of long gone, eroded mountain ranges, like in Scotland.
GlenGarry Forrest in Scotland was intended as a location for a Royal Navy ELF transmitter for communication with the Trident nuclear submarines.

It was reported to be using 72hz, this must have been a deception as this frequency would clash with the American system and would be unusable.
To be technical here: the USA system is listed as being on 76hz, but in reality it uses 80hz for a data '0' and 72hz for a data'1'.

This project was canceled as the expenses contra efficiency was too high and after a political debate was the Glen Garry ELF communication station turned into history. Or so they said.

Having found the frequency 'error' in what little documentation that I could find I started to wonder if there was some kind of coverup.

Then I came across the part of a report shown below.





This seems to add credence to the existence of the Glen Garry installation.
As can be seen on the capture below.
There is room for the USA at 72-80hz, the Russian ZEV version at 81-84hz, and the UK centered on 87hz , perhaps Glen Garry lives.

This is all supposition for now, some checking with my ELF receiver and spectrum analyser is the next step.

A visit to LochGarry would be interesting, but the antenna feeds would look like power distribution lines, with the ground terminations looking like more power equipment.