NGR meaning

In practice, NGR means the Ordnance Survey National Grid Reference used to pinpoint locations in Great Britain (England, Wales and Scotland). Lawyers use NGRs to describe land or features precisely in conveyancing plans, planning applications and decisions, environmental permits and notices, compulsory purchase schedules, wayleave and easement deeds, and in statutory instruments defining boundaries. The term is descriptive rather than a defined legal term; where legislation uses it, it usually states that coordinates are National Grid references by reference to Ordnance Survey mapping. An NGR combines a two‑letter 100km square with an even number of digits (for example, TQ 301 803; eight or ten figures give higher precision). State the coordinate system/datum (typically OSGB36) and ensure the precision matches the document’s purpose. Cross‑check NGRs against the plan used and the underlying GIS or Ordnance Survey data. Jurisdictional note: In Northern Ireland and Ireland, the equivalent is the Irish Grid Reference (IGR) or Irish Transverse Mercator (ITM) coordinates, maintained by OSNI and OSi. Do not label IGR/ITM as “NGR”. For cross‑border matters, provide both systems (and, if useful, WGS84 latitude/longitude) and align all references to the plan and survey datum.