I have counted up a peak weekday requirement on the existing services for about 26 units, noting that some only work part of the day and swap with other units at Crown Point.

If these are spare and Greater Anglia need to offset lease costs, could the spare 755s be redistributed to East Midlands Railway to run Norwich to Nottingham?

It looks like seven units would be needed for an hourly service Norwich to Nottingham. 33 (or 34) from 38 units seems eminently achievable even for a diesel fleet.

This might allow EMR to avoid needing to obtain the Southern 171s for a while.

My current estimate of weekday diagrams for 755s

Twelve units start at Norwich Crown Point

5J61 0420 Norwich C.Pt. T.&R.S.M.D to Lowestoft

2A04 0525 Lowestoft to Harwich International

2W06 0750 Harwich International to Cambridge

2W11 0947 Cambridge to Ipswich

2W12 1120 Ipswich to Cambridge

2W17 1247 Cambridge to Ipswich

2W18 1420 Ipswich to Cambridge

2W23 1547 Cambridge to Ipswich

2D88 1717 Ipswich to Lowestoft

2J89 1848 Lowestoft to Norwich

2P38 1940 Norwich to Great Yarmouth

2P39 2017 Great Yarmouth to Norwich

1K95 2115 Norwich to Cambridge

5K95 2244 Cambridge to Cambridge Sidings North

5J61 0420 Norwich C.Pt. T.&R.S.M.D to Lowestoft

2J61 0542 Lowestoft to Norwich

1K59 0633 Norwich to Cambridge

2K60 0819 Cambridge to Norwich

1K71 1033 Norwich to Stansted Airport

1K72 1248 Stansted Airport to Norwich

1K83 1527 Norwich to Stansted Airport

1K82 1755 Stansted Airport to Norwich

5P37 2016 Norwich to Norwich C.Pt. T.&R.S.M.D

5C00 0430 Norwich C.Pt. T.&R.S.M.D to Norwich

2C00 0506 Norwich to Great Yarmouth

2P01 0543 Great Yarmouth to Norwich

2P06 0652 Norwich to Great Yarmouth

2P07 0732 Great Yarmouth to Norwich

2P10 0809 Norwich to Great Yarmouth

2P11 0847 Great Yarmouth to Norwich

1K67 0927 Norwich to Stansted Airport

1K70 1148 Stansted Airport to Norwich

1K81 1427 Norwich to Stansted Airport

1K80 1648 Stansted Airport to Norwich

1K93 1927 Norwich to Stansted Airport

1K96 2210 Stansted Airport to Norwich

5S35 0047 Norwich to Norwich C.Pt. T.&R.S.M.D

5S04 0440 Norwich C.Pt. T.&R.S.M.D to Norwich

2S04 0510 Norwich to Sheringham

2S03 0631 Sheringham to Norwich

2C08 0736 Norwich to Great Yarmouth

2P09 0817 Great Yarmouth to Norwich

2J68 0855 Norwich to Lowestoft

2D77 1007 Lowestoft to Ipswich

2D78 1217 Ipswich to Lowestoft

2J79 1348 Lowestoft to Norwich

2P24 1440 Norwich to Great Yarmouth

2C23 1517 Great Yarmouth to Norwich

2P28 1640 Norwich to Great Yarmouth

2P29 1717 Great Yarmouth to Norwich

2P34 1804 Norwich to Great Yarmouth

2C35 1847 Great Yarmouth to Norwich

2P40 2040 Norwich to Great Yarmouth

2P41 2117 Great Yarmouth to Norwich

2J94 2205 Norwich to Lowestoft

5J94 2300 Lowestoft to Norwich

5J97 2349 Norwich to Norwich C.Pt. T.&R.S.M.D

5S04 0440 Norwich C.Pt. T.&R.S.M.D to Norwich

5S01 0457 Norwich to Cromer

2S01 0553 Cromer to Norwich

2J64 0645 Norwich to Lowestoft

2J65 0733 Lowestoft to Norwich

5D75 0825 Norwich to Lowestoft

2D75 0907 Lowestoft to Ipswich

2D76 1117 Ipswich to Lowestoft

2D83 1307 Lowestoft to Ipswich

2D84 1517 Ipswich to Lowestoft

2J85 1648 Lowestoft to Norwich

2J86 1750 Norwich to Lowestoft

2D95 1907 Lowestoft to Ipswich

5D95 2045 Ipswich to Ipswich Down And Up Goods

5D96 2102 Ipswich Down And Up Goods to Ipswich

2D96 2117 Ipswich to Lowestoft

2J97 2248 Lowestoft to Norwich

5J97 2349 Norwich to Norwich C.Pt. T.&R.S.M.D

5D69 0455 Norwich C.Pt. T.&R.S.M.D to Lowestoft

2D69 0614 Lowestoft to Ipswich

2D69 0614 Lowestoft to Ipswich

2E72 0803 Ipswich to Peterborough

2L73 0950 Peterborough to Ipswich

2E76 1201 Ipswich to Peterborough

2L77 1350 Peterborough to Ipswich

5L77 1530 Ipswich to Ipswich Down And Up Goods

5D86 1545 Ipswich Down And Up Goods to Ipswich

2D86 1554 Ipswich to Lowestoft

2J87 1748 Lowestoft to Norwich

2P36 1840 Norwich to Great Yarmouth

2P37 1917 Great Yarmouth to Norwich

5P37 2016 Norwich to Norwich C.Pt. T.&R.S.M.D

5J60 0510 Norwich C.Pt. T.&R.S.M.D to Norwich

2J60 0536 Norwich to Lowestoft

2J63 0635 Lowestoft to Norwich

1K61 0734 Norwich to Cambridge

1K62 0912 Cambridge to Norwich

1K73 1127 Norwich to Stansted Airport

1K74 1348 Stansted Airport to Norwich

2K85 1627 Norwich to Cambridge

5K85 1753 Cambridge to Cambridge Sidings North

5K92 2057 Cambridge Sidings North to Cambridge

1K92 2120 Cambridge to Norwich

2S36 2245 Norwich to Sheringham

2S35 2347 Sheringham to Norwich

5S35 0047 Norwich to Norwich C.Pt. T.&R.S.M.D

5P04 0544 Norwich C.Pt. T.&R.S.M.D to Norwich

2P04 0611 Norwich to Great Yarmouth

2P05 0658 Great Yarmouth to Norwich

2J66 0755 Norwich to Lowestoft

2J69 0850 Lowestoft to Norwich

2S12 0945 Norwich to Sheringham

2S11 1047 Sheringham to Norwich

2S16 1145 Norwich to Sheringham

2S15 1247 Sheringham to Norwich

2S20 1345 Norwich to Sheringham

2S19 1447 Sheringham to Norwich

2S24 1545 Norwich to Sheringham

2S23 1649 Sheringham to Norwich

2S28 1745 Norwich to Sheringham

2S27 1852 Sheringham to Norwich

2S32 1955 Norwich to Sheringham

2S31 2110 Sheringham to Norwich

2J96 2240 Norwich to Lowestoft

2J99 2330 Lowestoft to Norwich

5J99 0041 Norwich to Norwich C.Pt. T.&R.S.M.D

5P04 0544 Norwich C.Pt. T.&R.S.M.D to Norwich

2J62 0627 Norwich to Lowestoft

2D73 0727 Lowestoft to Ipswich

2R10 0958 Ipswich to Felixstowe

2R11 1028 Felixstowe to Ipswich

2R12 1058 Ipswich to Felixstowe

2R13 1128 Felixstowe to Ipswich

2R14 1158 Ipswich to Felixstowe

2R15 1228 Felixstowe to Ipswich

2R16 1258 Ipswich to Felixstowe

2R17 1328 Felixstowe to Ipswich

2R18 1358 Ipswich to Felixstowe

2R19 1428 Felixstowe to Ipswich

2R20 1458 Ipswich to Felixstowe

2R21 1528 Felixstowe to Ipswich

2R22 1558 Ipswich to Felixstowe

2R23 1628 Felixstowe to Ipswich

2R24 1658 Ipswich to Felixstowe

2R25 1728 Felixstowe to Ipswich

2R26 1758 Ipswich to Felixstowe

2R27 1828 Felixstowe to Ipswich

2R28 1858 Ipswich to Felixstowe

2R29 1928 Felixstowe to Ipswich

2R30 1958 Ipswich to Felixstowe

2R31 2028 Felixstowe to Ipswich

2R32 2058 Ipswich to Felixstowe

2R33 2128 Felixstowe to Ipswich

3F33 2208 Ipswich to Colchester

3F34 2335 Colchester to Colchester C.S.D.

5W04 0550 Norwich C.Pt. T.&R.S.M.D to Ipswich

2W04 0654 Ipswich to Cambridge

2W09 0847 Cambridge to Ipswich

2W10 1020 Ipswich to Cambridge

2W15 1147 Cambridge to Ipswich

2W16 1320 Ipswich to Cambridge

2W21 1447 Cambridge to Ipswich

2W22 1620 Ipswich to Cambridge

2W27 1747 Cambridge to Ipswich

2D92 1917 Ipswich to Lowestoft

2J93 2057 Lowestoft to Norwich

1K97 2240 Norwich to Cambridge

5H97 0019 Cambridge to Cambridge Sidings North

5D71 0600 Norwich C.Pt. T.&R.S.M.D to Lowestoft

2D71 0641 Lowestoft to Ipswich

5D72 0815 Ipswich to Ipswich Shunt Neck 1

5W08 0903 Ipswich Shunt Neck 1 to Ipswich

2W08 0920 Ipswich to Cambridge

2W13 1047 Cambridge to Ipswich

2W14 1220 Ipswich to Cambridge

2W19 1347 Cambridge to Ipswich

2W20 1520 Ipswich to Cambridge

2W25 1647 Cambridge to Ipswich

2W26 1817 Ipswich to Cambridge

2A48 1947 Cambridge to Harwich International

2D98 2147 Harwich International to Lowestoft

5D98 2347 Lowestoft to Norwich

5J99 0041 Norwich to Norwich C.Pt. T.&R.S.M.D

5J67 0640 Norwich C.Pt. T.&R.S.M.D to Lowestoft

2J67 0750 Lowestoft to Norwich

2P12 0836 Norwich to Great Yarmouth

2P13 0917 Great Yarmouth to Norwich

2P18 1036 Norwich to Great Yarmouth

2P17 1117 Great Yarmouth to Norwich

2P20 1236 Norwich to Great Yarmouth

2P21 1317 Great Yarmouth to Norwich

5P21 1421 Norwich to Norwich C.Pt. T.&R.S.M.D

Three units start from Norwich Stn C.S.D.

5K55 0507 Norwich Stn C.S.D. to Norwich

1K55 0533 Norwich to Cambridge

2K58 0700 Cambridge to Norwich

5K58 0841 Norwich to Norwich C.Pt. T.&R.S.M.D

5S06 0514 Norwich Stn C.S.D. to Norwich

2S06 0540 Norwich to Sheringham

2S05 0716 Sheringham to Norwich

2S10 0821 Norwich to Sheringham

2S09 0944 Sheringham to Norwich

2S14 1045 Norwich to Sheringham

2S13 1145 Sheringham to Norwich

2S18 1245 Norwich to Sheringham

2S17 1345 Sheringham to Norwich

2S22 1445 Norwich to Sheringham

2S21 1546 Sheringham to Norwich

2P30 1706 Norwich to Great Yarmouth

2C31 1747 Great Yarmouth to Norwich

2S30 1854 Norwich to Sheringham

2S29 1956 Sheringham to Norwich

2S34 2115 Norwich to Sheringham

2S33 2217 Sheringham to Norwich

5S33 2319 Norwich to Norwich C.Pt. T.&R.S.M.D

5P03 0550 Norwich Stn C.S.D. to Great Yarmouth

2P03 0624 Great Yarmouth to Norwich

2S08 0715 Norwich to Sheringham

2S07 0822 Sheringham to Norwich

2J70 1005 Norwich to Lowestoft

2D79 1107 Lowestoft to Ipswich

2D80 1317 Ipswich to Lowestoft

2D87 1507 Lowestoft to Ipswich

2W24 1720 Ipswich to Cambridge

2W29 1847 Cambridge to Ipswich

2D94 2017 Ipswich to Lowestoft

2J95 2148 Lowestoft to Norwich

5S36 2200 Lowestoft to Norwich C.Pt. T.&R.S.M.D

One unit overnight at Ipswich

5W01 0450 Ipswich to Bury St Edmunds Sig By19

5W51 0527 Bury St Edmunds Sig By19 to Bury St Edmunds

2W01 0531 Bury St Edmunds to Ipswich

2W02 0616 Ipswich to Cambridge

2W07 0744 Cambridge to Ipswich

2D72 0917 Ipswich to Lowestoft

2J73 1057 Lowestoft to Norwich

2J74 1205 Norwich to Lowestoft

2J77 1257 Lowestoft to Norwich

5J77 1341 Norwich to Norwich C.Pt. T.&R.S.M.D

Three units at Ipswich H.S.

5R00 0447 Ipswich H.S. to Ipswich

2R00 0504 Ipswich to Felixstowe

2R01 0534 Felixstowe to Ipswich

2R02 0604 Ipswich to Felixstowe

2R03 0636 Felixstowe to Ipswich

2R04 0714 Ipswich to Felixstowe

2R05 0747 Felixstowe to Ipswich

2R08 0857 Ipswich to Felixstowe

2R09 0928 Felixstowe to Ipswich

2E74 1001 Ipswich to Peterborough

2L75 1150 Peterborough to Ipswich

2D82 1417 Ipswich to Lowestoft

2J83 1548 Lowestoft to Norwich

2S26 1645 Norwich to Sheringham

2S25 1749 Sheringham to Norwich

5S25 1905 Norwich to Norwich C.Pt. T.&R.S.M.D

5R00 0447 Ipswich H.S. to Ipswich

2W00 0510 Ipswich to Cambridge

2W05 0642 Cambridge to Ipswich

2R06 0825 Ipswich to Felixstowe

2R07 0854 Felixstowe to Ipswich

2D74 1017 Ipswich to Lowestoft

2J75 1148 Lowestoft to Norwich

5J77 1341 Norwich to Norwich C.Pt. T.&R.S.M.D

5W03 0522 Ipswich H.S. to Bury St Edmunds Recp.

5W53 0617 Bury St Edmunds Recp. to Bury St Edmunds

2W03 0622 Bury St Edmunds to Ipswich

2D70 0735 Ipswich to Lowestoft

2J71 0948 Lowestoft to Norwich

5J71 1101 Norwich to Norwich C.Pt. T.&R.S.M.D

Three units start at Colchester C.S.D.

5E70 0530 Colchester C.S.D. to Colchester

2E70 0540 Colchester to Peterborough

2L71 0749 Peterborough to Ipswich

5L71 0930 Ipswich to Ipswich H.S.

5P60 1534 Ipswich H.S. to Norwich C.Pt. T.&R.S.M.D

5D66 0540 Colchester C.S.D. to Ipswich

2D66 0620 Ipswich to Saxmundham

2D68 0744 Saxmundham to Lowestoft

5D68 0838 Lowestoft to Norwich C.Pt. T.&R.S.M.D

5T01 0443 Colchester C.S.D. to Sudbury

2T01 0530 Sudbury to Marks Tey

2T02 0558 Marks Tey to Sudbury

2T03 0625 Sudbury to Marks Tey

2T04 0648 Marks Tey to Sudbury

2T05 0713 Sudbury to Marks Tey

2T06 0736 Marks Tey to Sudbury

2T07 0757 Sudbury to Marks Tey

2T08 0820 Marks Tey to Sudbury

2T09 0845 Sudbury to Marks Tey

2T50 0908 Marks Tey to Sudbury

2T51 0933 Sudbury to Marks Tey

2T10 1001 Marks Tey to Sudbury

2T11 1026 Sudbury to Marks Tey

2T12 1101 Marks Tey to Sudbury

2T13 1126 Sudbury to Marks Tey

2T14 1201 Marks Tey to Sudbury

2T15 1226 Sudbury to Marks Tey

2T16 1301 Marks Tey to Sudbury

2T17 1326 Sudbury to Marks Tey

5Y18 1348 Marks Tey to Ipswich H.S.

5P60 1534 Ipswich H.S. to Norwich C.Pt. T.&R.S.M.D

Two units start at Cambridge Sidings North

5H56 0540 Cambridge Sidings North to Cambridge

2K56 0602 Cambridge to Norwich

1K65 0833 Norwich to Stansted Airport

1K68 1048 Stansted Airport to Norwich

1K79 1327 Norwich to Stansted Airport

1K78 1537 Stansted Airport to Norwich

1K91 1827 Norwich to Cambridge

1K88 2020 Cambridge to Norwich

5K88 2145 Norwich to Norwich C.Pt. T.&R.S.M.D

5K66 0831 Cambridge Sidings North to Cambridge

1K66 1013 Cambridge to Norwich

1K77 1233 Norwich to Stansted Airport

1K76 1448 Stansted Airport to Norwich

2K89 1727 Norwich to Cambridge

1K84 1925 Cambridge to Norwich

2P42 2140 Norwich to Great Yarmouth

2P43 2217 Great Yarmouth to Norwich

2P44 2300 Norwich to Great Yarmouth

2C45 2334 Great Yarmouth to Norwich

5C45 0022 Norwich to Norwich C.Pt. T.&R.S.M.D

Then, nine units have a later start, most of which pair up with an earlier finisher

5P14 0912 Norwich C.Pt. T.&R.S.M.D to Norwich

2P14 0936 Norwich to Great Yarmouth

2P15 1017 Great Yarmouth to Norwich

2J72 1058 Norwich to Lowestoft

2D81 1207 Lowestoft to Ipswich

2E78 1358 Ipswich to Peterborough

2L79 1550 Peterborough to Ipswich

2E82 1741 Ipswich to Peterborough

2L83 1950 Peterborough to Colchester

3F83 2155 Colchester to Colchester

3F94 2255 Colchester to Colchester C.S.D.

5T18 1033 Norwich C.Pt. T.&R.S.M.D to Marks Tey

2T18 1401 Marks Tey to Sudbury

2T19 1426 Sudbury to Marks Tey

2T20 1501 Marks Tey to Sudbury

2T21 1526 Sudbury to Marks Tey

2T22 1601 Marks Tey to Sudbury

2T23 1632 Sudbury to Marks Tey

2T24 1708 Marks Tey to Sudbury

2T25 1732 Sudbury to Marks Tey

2T26 1805 Marks Tey to Sudbury

2T27 1837 Sudbury to Marks Tey

2T28 1913 Marks Tey to Sudbury

2T29 1938 Sudbury to Marks Tey

2T30 2008 Marks Tey to Sudbury

2T31 2033 Sudbury to Marks Tey

2T32 2101 Marks Tey to Sudbury

2T33 2126 Sudbury to Marks Tey

2T34 2201 Marks Tey to Sudbury

2T35 2226 Sudbury to Marks Tey

2T36 2301 Marks Tey to Sudbury

2F14 2326 Sudbury to Colchester

5Y14 2356 Colchester to Ipswich H.S.

5C16 1106 Norwich C.Pt. T.&R.S.M.D to Norwich

2C16 1136 Norwich to Great Yarmouth

2P19 1217 Great Yarmouth to Norwich

2J76 1255 Norwich to Lowestoft

2D85 1407 Lowestoft to Ipswich

2E80 1601 Ipswich to Peterborough

2L81 1750 Peterborough to Ipswich

5L81 1931 Ipswich to Claydon

5W30 2008 Claydon to Ipswich

2W30 2021 Ipswich to Cambridge

2W35 2147 Cambridge to Ipswich

5P84 2313 Ipswich to Norwich C.Pt. T.&R.S.M.D

5P22 1314 Norwich C.Pt. T.&R.S.M.D to Norwich

2P22 1336 Norwich to Great Yarmouth

2P25 1417 Great Yarmouth to Norwich

2P26 1536 Norwich to Great Yarmouth

2P27 1617 Great Yarmouth to Norwich

2J84 1658 Norwich to Lowestoft

2D93 1807 Lowestoft to Ipswich

2E84 2001 Ipswich to Peterborough

2L85 2146 Peterborough to Colchester

3F85 2352 Colchester to Colchester

3F86 0049 Colchester to Colchester C.S.D.

5P22 1314 Norwich C.Pt. T.&R.S.M.D to Norwich

2J78 1405 Norwich to Lowestoft

2J81 1457 Lowestoft to Norwich

2J82 1550 Norwich to Lowestoft

2D91 1702 Lowestoft to Ipswich

2W28 1913 Ipswich to Cambridge

2W33 2047 Cambridge to Ipswich

2W34 2219 Ipswich to Bury St Edmunds

5W84 2258 Bury St Edmunds to Bury St Edmunds Sig By19

5W34 2304 Bury St Edmunds Sig By19 to Ipswich H.S.

5J80 1425 Norwich C.Pt. T.&R.S.M.D to Norwich

2J80 1455 Norwich to Lowestoft

2D89 1607 Lowestoft to Ipswich

2D90 1813 Ipswich to Lowestoft

2D97 2007 Lowestoft to Ipswich

2R34 2228 Ipswich to Felixstowe

2R35 2301 Felixstowe to Ipswich

5R35 2330 Ipswich to Ipswich H.S.

5P32 1705 Norwich C.Pt. T.&R.S.M.D to Norwich

2P32 1736 Norwich to Great Yarmouth

2P33 1817 Great Yarmouth to Norwich

2J88 1902 Norwich to Lowestoft

2J91 1955 Lowestoft to Norwich

2J92 2105 Norwich to Lowestoft

5S36 2200 Lowestoft to Norwich C.Pt. T.&R.S.M.D

5W32 1904 Norwich C.Pt. T.&R.S.M.D to Ipswich

2W32 2117 Ipswich to Cambridge

2W37 2247 Cambridge to Ipswich

5W32 1904 Norwich C.Pt. T.&R.S.M.D to Ipswich

2J90 2005 Norwich to Lowestoft

2D99 2107 Lowestoft to Ipswich

5P84 2313 Ipswich to Norwich C.Pt. T.&R.S.M.D

and to balance

5P09 2131 Norwich C.Pt. T.&R.S.M.D to Norwich Stn C.S.D.

5P94 2240 Norwich C.Pt. T.&R.S.M.D to Norwich Stn C.S.D.