Just including this quote as it mentions Glasgow, and some of the controls in the bunker...

LMORESBY MOSS DECOY SITE, DISTINGTON

A national decoy authority headed by Colonel John Fisher Turner was set up in July 1940, and following earlier experiments in Glasgow and Sheffield.
A system of urban lighting decoys was set up similar to those used for military installations. These urban decoys were to be known as "Civil" sites; Civil QL for urban lighting simulation, and Civil QF for dummy fires.
"Q" - sites (which took their title from the Royal Navy's use of "Q" - ships; warships disguised as merchant vessels) were equipped with assorted electrical and pyrotechnical apparatus to simulate the flare given from furnace doors, steel-making, railway marshalling yards, and light given off by inefficient blackout precautions.

Ultimately, the civil decoy sites were staffed largely by civilian personnel from the works they were covering for. This was not always the case, though, and some sites were staffed by such diverse bodies as the police, the RAF Barrage Balloon Detachment, anti-aircraft ops. rooms, and the Civil Defence department. Navy and Army decoys were staffed by sailors and soldiers, and the RAF decoys were staffed by selected RAF ground-crew.

This site, which stands on Moresby Moss, was used to simulate "permitted lighting" given off by the Moss Bay Ironworks and Bessemer Converter five miles north of here. Permitted lighting was that which could not successfully be blacked out during air-raids, such as sparks from furnaces, coke-ovens, and loco firebox doors, etc. Banks of red and yellow lamps suspended from a canopy would cast their light onto trays of sand beneath, the whole operation being supplied via a rheostat in the control bunker. The brightness of the lamps would then be suitably adjusted to correspond to the variations in light observed when a real firebox door - for example - was opened.

Foxy-
According to the book, there were no engines in the single-room bunkers, just switchgear. There's no power supply shown at all.
The double-room bunker has three pipes exiting from the generator room into a large, 3 section external expansion tank and then converging into a smaller, single-section expansion tank behind that. A large diameter exhaust pipe is shown exiting the same wall, with another one in each side wall.

That makes sense, 3 engines 3 exhaust ducts.  However, Auchengreoch has wooden battens on the walls to accomodate a sliding board to shut off the duct, now this could have been retro fitted by the farmer, but pics of the same area of wall in other bunkers seem to show holes in the plaster that could have been fixings for similar battens.

On the subject of power, only one bunker, Drumnessie, shows signs of a duct from the engine room to the control room.  The others make do with standard  conduit.  In one there is a rag of cable still in the pipe and it looks domestic in size.

Anyone have any thoughts on the myriad of concrete bases on the decoy site?   They appear to be a jumble of different sizes and different orientations.  RCAHMS suggests that they held fire baskets and certainly the smaller square ones all show signs on some kind of steelwork having once been on them.  The others seem to have no fixings at all.  The broadest bases always seem to come in pairs with one about 9" above the lower one.

As a decoy it must have worked well judging by the proximity of that huge bomb crater and the nearest surviving bases.  I am inclined to agree with the Historian's assessment that it might have been caused by a landmine as it is double the diameter of ones I have seen before on the Renfrewshire hills although it might just be that the soft peat was very deep and it did not explode until it hit the rocky substrate.

As we've just mentioned Strowger systems, I happened across this example of a working system reconstructed by a museum:

Read More... from Internal Fire Museum of Power

Don't forget to click on the pics in the story, they will expand and are quite large so you can see the detail of the racks.

Nearer home, though not sure if he has any exchange equipment running, is the Darvel Telephone Museum.

Max Flemmich's  DARVEL TELEPHONE MUSEUM

Unfortunately, an empty web site at the moment...

The Darvel Telephone Museum contains a unique display of telephone memorabilia dating from 1900's to the present day.

At the moment there are no regular opening times.

Please phone 01560 320780 prior to visiting to ensure access. According to the site, access is free.

Darvel Telephone Museum
1b Burn Road
Darvel, Ayrshire
Scotland
KA17 0AJ
Scotland

Location

After 44 years employment with G.P.O. Telephones & B.T. and with duties covering the installation of telephones & switchboards, from the single householder to large business customers, it was only natural that Max Flemmich should carry on his interest in telephone memorabilia by putting together a collection of "100 years of the Telephone".

This is housed in a former bakery adjacent to his home in Darvel Ayrshire and it is the only one of its kind in Scotland. The museum is very "hands on".

The manual switchboards are operational; phones will dial through the automatic mechanical Strowger equipment, and semi digital systems. There are many examples of early wooden and metal magneto phones from the first half of the last century, as well as more modern switchboards and telephone equipment. There are opportunities to operate an old A & B coin box with its old style 2p's & 10p's, an earlier coin box using pennies, sixpences and shillings. Climb an old style shortened telephone pole and see how the wires connected up to the insulators or try out the morse code key.

East Ayrshire Council's Education Department have been approached regarding visits by school children. Along with electricity & magnetism, communications are to be shortly added to the school curriculum.

A visit to the museum gives an insight to the world of communications in the days gone by.

The Darvel Telephone Museum always seems to be open during Open Doors Day (programme not published yet, just the dates).

Quoted from The Fox

I am inclined to agree with the Historian's assessment that it might have been caused by a landmine as it is double the diameter of ones I have seen before on the Renfrewshire hills although it might just be that the soft peat was very deep and it did not explode until it hit the rocky substrate.

Not a landmine, but an aerial mine. They were big ****ers dropped on a parachute.

I recall reading somewhere that they were identical to the mines used in the sea but as you say dropped on a parachute.  Whatever it was it left a darned great hole in the ground especially considering it was more than 60 years ago.  I was impressed with the accuracy.

I think the large mines operated on time fuses so they did maximum blast damage from inside a building.  It means that they would explode even if dropped into soft ground unlike one with a contact fuse.  There is a post-war 1000lb bomb on one of the bombing ranges that never went off.  The RAF EOD teams used to have a look for it every year but never found it.

Darvel Telephone Museum managed to get a little publicity on Thursday, November 12, 2009, on STV's Greatest Scots, as part of the Bell presentation.