What would be the cost of grade separating Colwich? Less than 5-7bn I bet.
It not just about cost is it though? We’ve seen from the WCML and GWML that upgrades lead to extended period of delays and disruption, not to mention they are typically descoped by the time they are ‘complete’. I still regularly drive past masts doing nothing between Swindon and Bath. By the time they come to put wires in they’ll probably end up ripping the existing masts out and starting again.
There is a serious amount of madness in the RailUK community when it comes to HS2. Yes it’s not perfect, but nothing is. It’s not an either or situation. It’s HS2 or nothing.