I can't comment on the modern viability of Motorail but this network map is just hilarioushttps://twitter.com/MrTimDunn/status/1218091505489010688 …
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Birmingham to Worcester: 30 miles. On Motorail: 1338 miles via Inverness, Crewe and St. Austell
Birmingham to Aberdeen: 424 miles. On Motorail: 1549 miles via Inverness, Newcastle and London, in that order
Edinburgh to Inverness: via Newcastle
In fact there is no direct route from Edinburgh to Newcastle. That's Edinburgh to Inverness via London
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