Some sources for training:
The UK Mountain Leader Training Board.
https://www.mountain-training.org/
Navigation, navigation, navigation!
This is the UK body that administers the WGL; ML (mountain leader); WML; EML and SPSA/MIA/MIC (mountain instructor award).
I am probably out of touch with current state of award but just doing the 4-5 day Mountain Leader training at Plas-Y-Brenin (not the final assessment) is excellent. Yes I did do mine twice…. Everything comes down to navigation, oh sorry but your gps, fell over. Resection please. Not sure if classic abseil is stills thing though. ?
Old school books:
Eric Langmuir’s Mountain craft and leadership.
Peter Cliffe’s Mountain navigation.
The above are not “survival” but about how to organise and conduct expeditions and field trips. They tend to get over looked in the “SAS survival guide” market but are much more useful to civilian outdoor activities.
No landing Place series. Aircraft crash sites in British mountains. Sad but interesting sites to visit.
Ray Mears, The outdoor survival handbook. This is the one that covers the UK and is organised by season.
His other books are good. He is British outdoor sage. The Woodlore knife, just get a cheap mora… ?
John Fenna, various online articles, he used to write articles in Combat and survival and still active in UK bushcraft. I think he is a guide at St. Fagan’s living history site doing Celtic and Neolithic living. I will ask on the forum and update.
Hidden Valley bushcraft. Excellent YouTube “how too” guides. Inactive in the interwebs but still a great resource. I’ve tried to make videos and it’s hard work (therefore beyond me) plus an art to do anything that is informative.
Some left field references:
Jack Hargreaves. Archived TV series on you tube. I’ve included him as background on why certain things are in the UK countryside are as they are (or not).
Yes he is some old boy smoking a pipe and taking about fly fishing.
He knew more about ecology, sustainability, history and the environment sixty years ago than many people today.
He was Monty’s communications and intelligence specialist in WW2. He helped to set up a couple of British TV networks.
None of his shows had a script, just 45 minutes of knowledge delivered, no out-takes and very little editing.