Where do I start?
Definitely a more direct line from South Wales and Bristol to Bournemouth and Southampton without having to divert all the way around via Reading or endless trailing through Bath, Trowbridge, Westbury, Salibury etc.
Again, a grade separated, 25kv electrified line from Didcot to Southampton direct without routing via Reading for the proposed 30% increase in container traffic. Not exactly reinstating via Newbury but along those lines.
Not a completely new line but a line from Teesside, through Darlington, Barnard Castle, over Stainmore, Kirby Stephen, Appleby, Penrith to West Cumberland, via the biggest towns of Keswick and Cockermouth to Whitehaven, Workington or Maryport. All towns are much bigger and more important than in 1962/1966 when the lines were closed.
It was unforgivable that Penrith-Keswick was closed only 27 months before the WCML through Penrith was electrified with the best and fastest service Penrith ever had. Could BR not have delayed closure to see if revenue on the branch increased with extra passengers with better connections at Penrith? Only a few years previously, 1968 I think, 2 trains were run from/to London top and tailed from Penrith, for Keswick religious Convention. Only a fraction of 20,000 attending the Convention. More trains could have run but BR had closed signal boxes and reduced track to a single siding from Penrith limiting the number a trains that could operate on a One Engine in Steam principle. We need a proper functioning railway through the North Lakes to Keswick if not all the way to the coast.
Coking coal coke from the proposed mine at Whitehaven to Redcar (6 trains a day when in full production) could use this line to avoid congested nodal points of Carlisle and Newcastle with reduced fuel/mileage. As coke is a third of the weight compared to coal these trains could manage the steeper 1 in 60 gradients over the Pennines. Bulk is the limiting factor not weight.
Would £5billion be enough?
I would reopen Stanley Jnc to Forfar, 115mph, with new build 110/125mph railway from Forfar to just south of Stonehaven. This would reduce Glasgow-Aberdeen journey time to sub 2 hours reducing journey time by 20-30 minutes stopping only at Stirling, Perth and Stonehaven. Stations at Couper Angus, Forfar, and Brechin by Perth- Aberdeen stopping trains
Of course I wont mention Cross Gates-Wetherby-Harrogate-Ripon-Northallerton as a second route from West Yorkshire to Teesside, Tyneside and Edinburgh and commuter railway from Ripon, Harrogate and Wetherby into Leeds. It will keep to a later post.