Just booked 2 adult returns Stockport 2 Sheffield £19.80 obviously you need to then get to Chesterfield and back. But with all County fan's having to travel via Sheffield on the train anyway don't think Sheffield to Chesterfield tickets will be checked. If you book Stockport to Chesterfield for 2 then it's £47. It's the 8.54 from Stockport so be prepared for the long haul that day