Pure rubbish. Read the bloody thing. It's not difficult. Here it is.
https://assets.publishing.service.g.../987752/gbr-williams-shapps-plan-for-rail.pdf
"Existing devolved authorities in Scotland, Wales, London, Merseyside, and Tyne and Wear will continue to exercise their current powers and to be democratically accountable for them. They will continue to award contracts and set fares on their services, for instance."
"Variants to the national brand will be developed to refect the English regions, Scotland and Wales, while emphasising that the railway is one network serving the whole of Great Britain."
So essentialy, at most, you replace the "Wales and Borders" part of the livery with the "Great British Rail" one.
It's no big deal.