Surely it wouldn't be that much different to a 158 which has ERTM's and all mainline train crew sign.
With ERTMS isolated, no. The biggest difference is there's no analogue speedometer - a digital one appears on the screen, and it defaults to KMH.
Supposedly how they work with ERTMS switched on is going to be very different from the 158s, but nobody has done that training yet.
I'm surprised they will be using the ERTM's 197's when CAF at Chester already struggle to cope with the 197's they currently have.
It's a fair point. They've started using Crewe South Yard for overnight stabling of in service units (and not just long term storage of out of service units), and there's the extra roads at Shrewsbury Abbey Foregate as well, but that doesn't free up a whole lot of space.
But something needed doing - at the end of the day there aren't enough 197s available every day as there should be (partly because of their own faults, and partly because of delays with the new Valleys fleets) and it would be a shame not to use the ERTMS sets if available.