The railway had multiple comms networks, including the worlds largest DPNSS private network (based on a dogs dinner mix of PBX's from Mitel, Atea, Siemens, GPT etc etc), which meant they could dial across the UK quite happily and even link calls through some of the radio networks (ORN/NRN/CSR at the time). They 'modernised' a while back as part of network rail to use AXE10's with MD110's..... I've no idea what they're on now.
They've swapped out most of the radio networks now for their own private GSM. There used to be drive to use that for radio based signalling for trains, but I dont know if they ever got that off the ground.
Anyway, the biggest problem was always too many management layers and too many disparate systems. Privatisation fixed some of this, but also introduced other problems......
I did the loudest fart of my life while talking to the chickens yesterday, only to look up and see our extremely posh neighbour and her child walking by on the other side of the hedge. Still horror stricken now.
Definitely don't doubt Dawn - not if you value your life
We are out of lockdown today, so took the day off work to go diving.
The sun is shining, the sea is mirror smooth and a neap tide. Unfortunately I rolled my ankle walking the dogs yesterday so stuck at home feeling miserable.
There are four varieties in society: the lovers, the ambitious, observers and fools. The fools are the happiest.
Hippolyte Taine – French critic and historian (1828-93)
Evolution is great at solving problems. It's the methods that concern me.