OK, here is something that jon.e has challenged me to do...
I leave just about equidistant between the east and west coasts.
So, the idea is
1) Get first train to Morecambe from Bingley
2) Cycle from Morecambe (that's on the West Coast, Ben) to Scarborough (that's on the East Coast, Ben)
3) Get the last train back from Scarborough to Bingley.
The logistics just about work out:
On a Saturday, first train gets me to Morecambe at 08:46
Then a little 122 mile road across the country (hilly bit is in the first half), this would be the quickest route, so not incredibly scenic.
Then the last train is at 20:48
Of course, getting an earlier train is better.
I would anticipate averaging 20kph (including stops for food etc), so it should be doable in about 9h:45m.
... Was thinking of doing it this month (September), but following on from the ride with Brad, I've still not got the pain issue quite sorted....