The majority of the tube network is pretty much already at peak capacity, with trains on the Victoria, Jubilee and Northern being full autonomous with moving block systems as separation distance can now only be maintained through autonomous systems. I think an express service would be wonderful but it would require careful orchestration.
I think it might be worth increasing the line speed through signaling upgrades and more automation.
I think it might be worth increasing the line speed through signaling upgrades and more automation.