I am not a railway engineer so cannot answer what technical work could be done or how much it would cost, the point is it should be done and would be beneficial. This is not a speculative thread, so let us not deliberate on the what or how. Although, if you are interested in finding out that info feel free to create a new thread. I created one myself out of interest. Anyone who knows what could be done should speak to Network Rail as this is a genuine issue.
Over several posts I have explained that services to and through Birmingham are slower compared to other towns further away, resulting in services to Scotland being slower than they should be, and there is no further detail to add. The environmental benefits may sway people from flying instead of taking the train via reduced journey times.
HS2 will not be the great solution you may think it will be. It certainly will not reach Scotland for a very very long time, if ever. Perhaps knock 30 minutes off current journey times if that. We all thought HS1 would be the best thing to happen to Kent since sliced bread and it was not - I live here. On the subject of more regional services through Birmingham, in 2040 should these remain as slow as they are today? Considerable work was done for Eurostars in Kent. Lots of extra fast lines and loops were installed which see little use today. Although, when they are used the benefit is felt.
None of it will happen with HS2 being built, that we can agree on