Hi, Lindengate is a Charity based in Wendover, Buckinghamshire. They are building a garden and indoor areas that are aimed at helping people with mental health issues through nature and horticulture. It's a really exciting project and I've been involved in helping develop some of the site (which is set to launch soon).
This is their website with all the information on:
www.lindengate.org.uk/index.html
Just pop along if you're in the area and it appeals to you!