Fyi, apologies for slightly off topic but just got an email from memory map re their sale and app
Memory map app and os maps sale
The perpetual license allows you to use the map for as long as you like without ever having to worry about the licence expiring, but it does not include any map updates. Many of our customers are still using maps published many years ago, and that is fine when the hills don’t change. However, footpaths and other man-made features do change, and it is important to know your rights of way and open access land areas. We find, in practice, most people update their maps at least every 5 years.
Click HERE for the 1:25,000 OS Explorer map (from £19.99)
Click HERE for the 1:50,000 OS Landranger map (from £15)
For more information see our website HERE.
Memory-Map for All app
https://memory-map.com/maps/uk-os-topo-maps/?adref=2402
https://memory-map.com/software/mmfa/