It's been mentioned in another thread, now that Daw Mill colliery has closed, there is the opportunity to considerably straighten the Coleshill-Nuneaton route.
A straight line from Shustoke Reservoir to Galley Common would cut ~2km from the distance, & the tunnel at Ansley. (Cuts ~1minute at 70mph)
It would also be able to be built to the newer W12 gauge, or bigger. Hams Hall is only 2km away from the Shustoke end, with 1 accommodation bridge & Station Rd bridge between them.
Build it ready for 3-4 tracking & electrification.
As it would be a new formation, it wouldn't have the expense of working on the existing line until connecting the ends.
There could also be some recovery of costs from selling the old formation.

A straight line from Shustoke Reservoir to Galley Common would cut ~2km from the distance, & the tunnel at Ansley. (Cuts ~1minute at 70mph)
It would also be able to be built to the newer W12 gauge, or bigger. Hams Hall is only 2km away from the Shustoke end, with 1 accommodation bridge & Station Rd bridge between them.
Build it ready for 3-4 tracking & electrification.
As it would be a new formation, it wouldn't have the expense of working on the existing line until connecting the ends.
There could also be some recovery of costs from selling the old formation.