ETCS testbed: the Cambrian line. TfW’s No 158837 crosses Barmouth bridge on 22 June 2021 with the 17.42 Pwllheli to Machynlleth.
Steve Widdowson

I don’t normally write about signalling because it bores me, but for this I’ll make an exception. Ever since the bobby with the red flag, signalling systems have increased in complexity and cost in the quest for increasing safety and/or reducing running costs.

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