I’m using te talkytoaster link to open maps.. Brilliant and sufficient for GPS use… Had it strapped to the Nicolai today and at 89 quid, what a bargain !

http://www.navitotal.com/showthread.php?11240-Garmin-GB-Discoverer-v3.0-national-parks-and-trails-1-25K

http://www.navitotal.com/showthread.php?10663-GB-Discoverer-50K-v3.0-Great-Britain-National-Parks-1-50K&highlight=garmin+topo

http://www.navitotal.com/showthread.php?2398-Garmin-Topo-Great-Britain-v2-MapSource&highlight=Garmin+Topo+Great+Britain

Tried the garmin maps and talkytoaster, talkytoaster all the way 🙂