I'm probably one of the last people to be trained by BR to maintain, renew and enhance telegraph poles and telegraph pole routes. I joined BR, in Norwich, in July 1964 and, on my second day, was told to catch the 06:20 from Norwich and join the Telegraph Gang, the Ganger was Jock Hanney.
I wont bore you with all the story but the first thing I got involved with was the renewal of a Telegraph Pole in Brandon Yard - between Thetford and Ely. It's still standing, I went past there a couple of months ago. No wires on it now, the areas been cabled (at last!) but I know exactly which pole it is because the arms are off-set to carry the wires past the water tank used to top up the steam engines (long gone, but the pole with the off-set arms remains!). At the end of July this year I will complete my first 50 years in the Railway Industry so that pole has stood there for all that time! Next time I'm that way - I still have family in Norfolk - I'll take a picture of it.