The way you've drawn Hunmanby is no different to Battersby/Bradford Interchange, but the reversal of the service is kind of important as the orientation of the train will reverse (So back becomes facing, and vv). This, I accept, may not be important to you, who is drawing it.
You're missing the Direct Leeds-York line between Micklefield and Church Fenton, the way you've drawn that area suggests either that all york service terminate at Selby or you can get a direct train from Sherburn to south Milford.
You're also missing the direct Northallerton-Yarm-Eaglescliffe Route. And the way you've drawn Carnforth suggests to me that Hellifield - Barrow is possible but Hellifield - Lancaster isn't (the third side of the triangle at Carnforth is not connected at at least one end), when it's the other way round. The issue of the Morecambe line being South of Lancaster and Carlisle being shown slightly misleadingly (the Hexham and Maryland lines cannot directly connect through the station) are me being pedantic rather than any thing else)
Looking further ahead, when the ECML is drawn in you're going to want to re-work the whole York/Selby area. If you're determined to do your own map and not use the one I linked to in post #22 as a base, I'd suggest that you put the Main Lines in first, to a station beyond the area of focus (I.e. in your current state WCML to Wigan NW, ECML to Doncaster) then go back and fiddle with it as you're putting in the local lines.
For me personally, I associate 45 degree angles with continuous train movement, and 90 degree angles with a stop and reversal, and anything greater than 90 degrees as an impossible move for the train. You've also not made any distinction between lines that cross each other without interaction and lines that are draw at 90 degrees to each other for the map, but do have a physical junction on the ground. If your intention is to show services rather than the network, it may be worth at Larger stations doing the tube-style separate circle for terminating lines. (Carlisle and York are the ones that spring to mind).
There is also a Network Rail produced diagrammatic map, as can be seen in their long-term strategy documents, which would pretty much fulfill what you're after. (
https://www.networkrail.co.uk/wp-content/uploads/2019/06/Network-Specifications-2019-LNE-EM.pdf). I've so far only seen it broken down by area, so a national map would involve some cutting and sticking.
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EDIT: for anybody interested, here's NR's Long-term strategy page
https://www.networkrail.co.uk/running-the-railway/long-term-planning/