Brilliant thanks for that. The Diagrams you’ve provided have much better clarity. I’d assumed the swift diagrams had drawn the gantries to the side to make things clearer but I’m glad you could confirm they’re brackets. I have to say its a very impressive array of signalling for what amounts to colliery reception/exchange sidings.
As a secondary question, I was curious that my 1972 SA shows Frickley colliery box as still being open (the next one I have is 1979 and its closed), however it also shows the colliery branch as now being OTW into a rapid loader and run round line, which is the “later” arrangement I’m more familiar with once Frickley closed and Moorthorpe South Controlled the branch entrance.
Having trawled through OS maps I can’t find a definitive answer, but presumably for a time, probably a very short time, Frickley controlled a much reduced layout prior to being abolished?