Thirsk?
Is it not known for the wierd curved platforms or am I getting muddles up at this late hour.
Dorchester South?
A Clagmonster specialClue 1:
This station is north of Penzance.
(2 is a prime number as well).
As is 1 !! 2 clues gone, and less than 0.5% of stations eliminated !:-x:-x