A survey on UK Climbing about diversity and barriers to participation in climbing and hillwalking (or potential participants if this has been something you have wanted to do but haven't).
"it has become obvious to researchers and organisations that there is a lack of available and high-quality data that tells us who is and who is not participating. You don't sign in to a National Park, the mountains.."
www.ukclimbing.com/articles/features/inclusion_in_the_outdoors_a_survey-13471
I have completed it and suggested that their method of data collection asking for gender might not be the best, there is thankfully a free text box.