Diagrams on a Saturday are quite fluid so can change with events/engineering works, but the base diagrams are:
1C12 0621 Derby to St Pancras International
1M16 0901 St Pancras International to Corby
1P29 1016 Corby to St Pancras International
1M31 1201 St Pancras International to Corby
1P44 1316 Corby to St Pancras International
1M46 1501 St Pancras International to Corby
1P59 1616 Corby to St Pancras International
1M61 1801 St Pancras International to Corby
1P74 1916 Corby to St Pancras International
1D78 2126 St Pancras International to Nottingham
1C27 0849 Sheffield to St Pancras International
1F28 1126 St Pancras International to Sheffield
1C57 1449 Sheffield to St Pancras International
1F58 1726 St Pancras International to Sheffield
1C62 1549 Sheffield to St Pancras International
1F63 1826 St Pancras International to Sheffield