Overview
- The convergence of true, magnetic and grid directions departs the English mainland at Berwick-upon-Tweed before moving into the North Sea today.
- The triple match first appeared in November 2022 at Langton Matravers in Dorset and has since crossed Birmingham, the Pennines and Northumberland.
- Ordnance Survey’s Mark Greaves calculates the track will total about 358 miles over 1,127 days, roughly 511 metres per day.
- Forecasts indicate a brief return on Scottish soil in late 2026, with a path projected through Drums, Mintlaw and Fraserburgh before heading offshore again.
- The British Geological Survey and Ordnance Survey monitor the field at more than 40 UK sites, noting long-term timing remains uncertain but operational effects are negligible.