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With the current spell of hot weather causing so many speed restrictions being implemented why aren't breather switches taking out this excess heat expansion? Is there enough of them on the network or isn't that their primary purpose? Sorry I can't provide a photo of an example of a breather...

What purpose do overhead neutral sections (OHNS) serve on the AC wires? Is it some sort of "border" between differing overhead sections for ease of isolating without switching off the entire network? Also do trains have to lower their pantographs when they coast through them? Thanks to your...

I know the difference between an ESR and a TSR but what, if any, is the difference between a TSR and a PSR? If there is why isn't a PSR just marked down as linespeed then as they aren't mentioned in the sectional appendix? Thanks for anyone who can shed some light on this in advance..

Just a quick question,in the rule book it states the action taken by a signaller when "both fishplates are broken on the same rail". Does this mean two fishplates on either end of a 60ft length of rail or two fishplates opposite to one another across the 4 foot (ie one on the cess rail and one...

Simple question with probably a good explanation behind it;why do so many trains run with only one headlight lit during daylight hours. Any reasons?

Ive been accepted to start training to become a signaller and obviously Im ecstatic! Just wondering if anyone out there can give me some advice on what to expect regarding the exams. I believe they are on a weekly basis but how stringent are the pass marks? Are they over 75% mark and do you...