Our booking engine at tickets.railforums.co.uk (powered by TrainSplit) helps support the running of the forum with every ticket purchase! Find out more and ask any questions/give us feedback in this thread!
Actually, some 455/9s have thyristor control. But not all. If they had thyristor control there would be no 'pop' with the shut off of power.
Sent from my SM-G925F using Tapatalk