Install the "what3words" app. When opened it will show you a blue dot for your position and the 3 words at the top of the screen are accurate (to the 3 metre square) where you are. The Emergency Service will ask you for the words.
Tells you what the rescue services need to know.
All smartphones can make emergency calls independently of a SIM card via any available system.
If you have a signal for your provider, most smartphones with operating systems higher than IOS10 or Android 9, can automatically activate GPS and text the GPS coordinates to provide accurate location information to Emergency Services by SMS.
Sources, apps & data are dependent on your particular phone and/or operating system.
Osala.org.uk can be used to view a downloaded GPX on an OS 1:25k map online (Instructions are here)
Website archive of routes and photographs
How to find records of our trip routes going back to 2011 and photographs of them back to 2006 (usually only the A route). These can be helpful for planning routes for forthcoming trips.