Sorry, back on topic. For me, a variety of youth groups is ideal. The local youth orchestra is as important to its members as the ATC or Scouts.
However, I think there’s a gap for a wildlife and outdoors focussed, environmentally proactive group. Many young people don’t understand or even have an awareness of the amazing nature around them. Perhaps learning about the wild UK, identifying flora and fauna, with the ability to operate outdoors on expedition to really enjoy the natural environment. Taking part in activities like surveys and support for nature reserves.
I suspect the Scouts are the closest? Perhaps there’s another organisation that I should move to?