Looking at the F3s included in the application they're interestingly numbering the services as if many more trains are on their agenda in the future:
SX
1A82 0920 Sheffield to Kings Cross
1A86 1654 Sheffield to Kings Cross
1G03 1248 Kings Cross to Sheffield
1G07 1956 Kings Cross to Sheffield
SO
1A82 0920 Sheffield to Kings Cross
1A86 1654 Sheffield to Kings Cross
1G03 1248 Kings Cross to Sheffield
1G07 2027 Kings Cross to Sheffield
SuO
1A82 0957 Sheffield to Kings Cross
1A86 1714 Sheffield to Kings Cross
1G03 1256 Kings Cross to Sheffield
1G07 1956 Kings Cross to Sheffield
Of course 'G' for a planned service on the Eastern Region is total nonsense. Really these should be 'J' but whereas Northern Scarborough to Sheffield are from 1J3x upwards Monday to Saturday on Sundays they're 1J0x for no apparent reason.
It's also interesting quite how much dwell time some of these trains have, for instance SX 1A82 has 2 minutes at Woodhouse, 6 at Worksop and 15 at Retford!