If you were heading to Penzance and left after dinner about 8pm from London you'd be there before 3, allowing a good 6 hours sleep before getting up at 9 and starting the day at 10. If you're an early bird stop off at Exeter about midnight in a holiday inn next to j29, then resume the next morning at 7.30, being in Penzance about 9.
If you took the train you'd be twiddling thumbs until midnight then get about 4 hours broken sleep (in my experience) before being ready for the day - sans shower, at a similar time.
Now during the day the train wins - took 8 hours to go Penzance to Manchester yesterday, 3 hours to Exeter. That's as slow as the train, and far less comfortable.
It used to take 5h30 (3h30 to Exeter services, 1h30 to Penzance), 6 with bad traffic.
If you took the train you'd be twiddling thumbs until midnight then get about 4 hours broken sleep (in my experience) before being ready for the day - sans shower, at a similar time.
Now during the day the train wins - took 8 hours to go Penzance to Manchester yesterday, 3 hours to Exeter. That's as slow as the train, and far less comfortable.
It used to take 5h30 (3h30 to Exeter services, 1h30 to Penzance), 6 with bad traffic.