VGHikers and gunwharfman - I'll make a note of that, especially concerning Memory-Map and Backcountry. I've not used either of them as I've done very little longer distance hiking in the UK in recent years. That's something I could look into, gunwharfman, including Offa's Dyke at some time. Thanks both.
Islandplodder - That's a good idea and one I could have do with thinking previously. Far less fiddling.
*Owen - Yes, I have a Garmin 64ST that I'm using these days. Not 100% expert yet, but getting there. It's especially good for preplanned trails. As for Viewranger, not used that either, yet. I have used AllTrails, though. Also, in Norway, I used Wikiloc sometimes, but mainly OSM for Android; That was the best, along with Norgeskart.
richardh1905 - I used to work in Rhandirmwyn, the Doethie Valley and all around there (environmental work), and it was a really beautiful area to work in. I still venture up there from time to time, red kites and all.
* The part of Norway I was in is the region of Nordland, on the Lofoten Islands, an archipelago of seven islands just over 160km inside the Arctic Circle. It's a truly magical place and the landscape there is almost untouched by modern day ravages of man. If you appreciate and enjoy isolation in 'raw', spectacular nature, this is somewhere I'd recommend (keeping it a secret of course
). I was trekking there alone for almost 6 weeks last year and returned to so-called civilization looking like Hagrid (apparently :p). A retirement near-wilderness adventure treat to myself. I will go back.
Thanks for your replies. I'm pretty much a newbie to trail hiking in the UK, so this all helps.
(BTW, If I don't reply quickly, it's only because I'm not online every day.)