Darnall is supposedly the least used station in South Yorkshire with 13,024 passenger entrances and exits in 2018-19, for perspective Sheffield station has about 10,000,000. You can enjoy its delights here

Not sure which is the least used of the 2566 stations in the UK, Barry Links is low at position 2558 with 122 E&E up from a magnificent 24 in 2016/17 but the prestigious least used station is probably a tie between Denton and Stanlow & Thornton at 46 E&E.

Redcar British Steel has shot up the league table mainly I think because people go there as it was the least used in Britain, BTW you can't get out the station.