Did a quick search, and it seems no one has ever posted this before...
http://orr.gov.uk/__data/assets/pdf_fil ... -facts.pdf
I would have thought it would appeal...anyway, what's really interesting is the least-used stations (those with fewer than 100 entries & exits).
In reverse order...
Reddish South, most southerly & scraping in with 94.
Kildonan, most northern, 76.
British Steel Redcar, presumably because there's no British Steel any more, 50.
Breich, somewhere near Edinburgh by the looks of it, 48.
Tees-side Airport, winner in previous years and just down the road from BSR, 30
But the winner with a spectacular 24 entries & exits in 12 months, but somewhere near Dundee is Barry Links (wild cheering in the style of Kermit The Frog).
Anyone fancy a trip out?