Using this link http://apd.anquet.com/maplegends/NAT_GRID_GB.gif you will access an overview map of the 1:25,000 scale map showing the Grid Letters assigned to each area of the country.
OS Grid Letters overview map
Modified on: Tue, 7 Jan, 2020 at 12:05 PM
Did you find it helpful? Yes No
Send feedbackSorry we couldn't be helpful. Help us improve this article with your feedback.