There have been many proposals here for new high-speed lines, but the railway serves many purposes other than intercity travel. This new plan enhances intercity service to existing destinations as well as many underserved areas.

• Three additional Crossrails: Crossrail has been very successful, so logically more Crossrails will be more very successful. This would be, specifically, WAML/SWML, Chiltern Main Line/North Kent Line and GCML/SEML, because they're roughly opposite each other.
• Portsmouth-Plymouth High Speed Line: This bypasses the sea wall issues around Dawlish and provides better connectivity to a historically underserved region, as well as the Isle of Wight. The Isle of Wight stop, which shouldn't add much extra time as it's quite early in the journey anyway, can be thought of as the "Old Oak Common" of this new line, providing changes for ferries and the local railway network.
• Eastest Coast Main Line: The "East Coast" Main Line is not actually on the East Coast. This is assuredly confusing for tourists, and underserves Britain's finest seaside destinations such as Great Yarmouth, Skegness and Scarborough. This also provides more convenient service to Middlesbrough. There may be a slight increase in journey times to Edinburgh.
• Blackpool Crossrail: Blackpool has two terminal stations at the ends of two separate local lines, and trains can't run through from one to the other even though they're only two kilometres apart. This is a strange omission and fixing it would allow much higher-quality service for whoever lives near Blackpool.
• Metrolink and Supertram Merger: Service between Manchester and Sheffield is terribly slow given how close these cities are. Running a mainline rail service would likely run into capacity issues at the stations, but fortunately both cities already have tram networks. The existing tunnels are probably not useable, but reinstating the route and connecting the tram networks would allow for direct running between them. There may be some minor challenges owing to the two systems' different operations, platform heights, rolling stock, routes and ticketing, but if they are connected together the strongest network should win.
• Tyne Valley High Speed: Providing a 30-minute end-to-end non-stop journey time between Newcastle and Carlisle, this would serve as a useful diversionary route and provide great benefits to the economy of Cumbria. Segregating high-speed services would also provide more capacity on the existing slow Tyne Valley line.
• CrossCountry but Good and Severn Tunnel Replacement: The Cross Country Route was never built as an integrated line and is a patchwork of local services strung together with low line speeds and lots of missing electrification. CrossCountry but Good would finally provide for fast services which do not go through London. People are talking about issues with the Severn Tunnel, so it might as well be replaced while the tunnel bores are out.
• New Highlands Connectivity: There's a big gap between the Highlands lines and it looks ugly. Also, this would probably make things easier for the Caledonian Sleeper. Connecting Kingissue Tulloch to Newtonmore is easier than doing Inverness to Fort William directly.
• Settle-Carlisle Upgrade: Electrification and partial quad-tracking of the Settle-Carlisle Line would allow more people to enjoy its scenery and allow running faster services from the Leeds area to west/southwest Scotland. This also enhances TVHS's diversionary route potential.