Weekly Operating Notices were issued (usually) weekly as a means of updating railway staff with the latest information regarding speed limits, signalling alterations and changes to operating procedures and other working documents. They consisted of four sections (naming occasionally differs, but generally as follows):
- Section A: Temporary Speed Restrictions
- Section B: Temporary Engineering Works
- Section C: Signalling and Permanent Way Alterations
- Section D: General Instructions and Notices
These can provide a wealth of information for researching signalling history, as they often include descriptions of signalling changes (and sometimes diagrams of larger schemes.)
British Railways North Eastern Region
British Railways Eastern Region
North Eastern Area – North (NE/N)
North Eastern Area – South (NE/S)
Northern Area – North (NN)
- 1973 NN 18
- 1974 NN 27
- 1974 NN 28
- 1974 NN 29
- 1974 NN 30
- 1974 NN 31
- 1974 NN 32
- 1974 NN 36
- 1974 NN 37
- 1974 NN 38
- 1974 NN 39
- 1974 NN 42
- 1974 NN 44
- 1974 NN 46
- 1977 NN 3
- 1978 NN 8
- 1980 NN 18
- 1980 NN 29
- 1982 NN 45
Northern Area – South (NS)
- 1976 NS 29
- 1982 NS 38
- 1982 NS 39
- 1983 NS 10
- 1984 NS 6
- 1984 NS 12
- 1984 NS 48
- 1988 NS 35
- 1988 NS 38
- 1988 NS 43
- 1988 NS 44
- 1988 NS 46
Instructions Applicable to London Midland Region (LM)
Instructions Applicable to Southern Region, London Transport, London Midland and Western Regions
- 1972 S 17 London Transport and Southern Region
- 1972 S 18 London Transport and Southern Region
- 1972 S 34 London Transport and Southern Region
- 1973 S 34-35 London Transport and Southern Region
- 1974 S 7 London Transport and Southern Region
- 1974 S 26 London Transport and Southern Region
- 1979 S 29 Southern Region, London Midland and Western Regions
- 1979 S 34-35 Southern Region, London Midland and Western Regions
- 1981 S 18 Southern Region, London Midland and Western Regions