I am 72 and have been working a no dig allotment for six years. It's on the Western Avenue site Hillingdon UB109QE. I call it Freezelandia.
It's very open and exposed and wet. It's a large plot, now well established, developed from what was a grass covered unused mid position site, infested with wireworm.
A lot of work and cost to setup in 2018 but now easily tended and productive.
It's a free site to over 65's supported by the Hillingdon Borough Council Green Spaces Team. The team supply water, good perimeter fencing and a composting toilet on site. I believe there are empty or unused plots available. You can see two unworked plots either side of mine.
There are about 60 plots each about 90 sq mtrs running North to South.