Leeds - Sheffield
xx:32 - All stops - Woodlesford, Castleford, Normanton, Wakefield Kirkgate, Darton, Barnsley, Wombwell, Elsecar, Chapeltown, Meadowhall, Sheffield (80 minutes)
xx:37 - Express - Wakefield Kirkgate, Barnsley, Meadowhall, Sheffield (58 minutes) - although some of these services now go on to the likes of Lincoln afterwards
They often depart from 17A and 17B respectively too but you often find some passengers heading for stations that the express service calls at end up on the slow train without doing the maths and assuming it will get them there first because it departs 5 minutes earlier! (although there is now some slight logic to this choice if travelling on advance tickets as they're cheaper on the slow service!)