Know exactly where you are on the railway.
Your Engineer's Line Reference, track and mileage from your phone's GPS, anywhere on the Great Britain network, with or without a signal.
Calibrated mileage
Miles and yards (or kilometres) from Network Rail's own calibrated measures, checked against every milepost.
Which track you're on
Track IDs such as Up Fast or Down Slow, from Network Rail's centrelines, with the most accurate surveyed lines used where available.
Works offline
The whole network's track data lives on the phone. Download maps for a work site before you go.
Track data
- Network Rail release
- 28 September 2026
- Published
- 14 October 2026
- Mileposts within 5 yards
- 99.42% of 42871
For reference and situational awareness only. Never use it to make safety-critical decisions: physical markers and official Network Rail documentation always take precedence. Positions are subject to normal GPS accuracy.