BR (ER) Signal Alterations Notice No. 68 1974 Hornsey-Wood Green- Bounds Green 2 very large Diagrams.
BR (ER) Signal Alterations Notice No. 46 1973 Wood Green - Potters Bar
BR (ER) Signal Alterations Notice No. 87 1977 Kings Cross Station
BR (ER) Signal Alterations Notice No. 75 1975 Finsbury Park 2 & Wood Green
BR (ER) Signal Alterations Notice No. 70 1974 Wood Green - Finsbury Park No. 6
BR (ER) Signal Alterations Notice No. 66 1974 Finsbury Park - Holloway
BR (ER) Signal Alterations Notice No. 52 1973 Finsbury Park - Wood Green
