rather more impressive (ie noisier) SRN6

SRN [Strategic Road Network] investment should prioritise maintenance of existing roads over the building of new ones. Transport Focus noted in its written evidence that drivers would prefer to have better maintained and managed roads over new ones, and the AA found that its members were most concerned about potholes. Yet RIS2 allocated £14.1bn for new and enhanced roads – more than it did for operations and maintenance. The committee recommended that if necessary, funding put aside for costly new road projects should be reallocated towards existing road upkeep.

It will also improve access to the water for boaters, as new bank protection is being put in place along the canal.

Problem is all Governments irrespective of the colour of their rosette suffer from strategic myopia when it comes to committing government funding, they are willing only to see as far as the next general election

There’s a challenge (working out which ones you could reach by train, that is) that I could not resist!
I think the answer is 169, with most of the unreachable-by-rail maps being those for the Shetlands, Orkneys, Hebrides, and remoter parts of Scotland (principally in the Highlands, but also a few in the Southern Uplands and Borders). Sheet 95 is the Isle of Man, and 190 is the only one entirely in England with no rail connection (Bude & Clovelly).