Last update 11 June 2026
Mileages are given in the form miles.chains unless stated otherwise. Figures prefixed with ≈ are approximate, those in parentheses are not on this route but are given for reference. Reference to 'start'/'end' of an asset are as read down the page.
50.00 junction with SPC1 50.72 start of Bromham viaduct 50.79 end of Bromham viaduct 51.50 Oakley Junction with BNN 51.78 start of Clapham viaduct 52.04 end of Clapham viaduct 52.78 OAKLEY 53.29 start of Oakley [fast lines] viaduct and start of Oakley [slow lines] viaduct 53.35 end of Oakley [fast lines] viaduct and end of Oakley [slow lines] viaduct 54.17 start of Milton Ernest [fast lines] viaduct 54.18 start of Milton Ernest [slow lines] viaduct 54.25 end of Milton Ernest [fast lines] viaduct and end of Milton Ernest [slow lines] viaduct 54.77 start of Radwell [fast lines] viaduct and start of Radwell [slow lines] viaduct 55.03 end of Radwell [fast lines] viaduct and end of Radwell [slow lines] viaduct 56.16 start of Sharnbrook [slow lines] viaduct and start of Sharnbrook [fast lines] viaduct 56.25 end of Sharnbrook [slow lines] viaduct and end of Sharnbrook [fast lines] viaduct 56.52 Sharnbrook Junction 56.53 SHARNBROOK 58.11 Souldrop 58.34 mileage junction with WYM 62.02 mileage junction with WYM (62.07) 62.54 IRCHESTER 63.54 Irchester Junction with HFB (0.00) 63.60 start of Irchester [fast lines] viaduct and start of Irchester [slow lines] viaduct 63.67 end of Irchester [fast lines] viaduct and end of Irchester [slow lines] viaduct 64.51 start of Wellingborough [fast lines] viaduct 64.52 start of Wellingborough [slow lines] viaduct 64.57 end of Wellingborough [fast lines] viaduct and end of Wellingborough [slow lines] viaduct 64.71 Wellingborough Junction with LPW (0.00) 64.78 Wellingborough Junction with SPC3