Charles, I noticed on your site a reference to mushrooms. It is worth noting that inedible and posisonous mushrooms can grow in veg and flower beds. I recently found some Melanoleuca verrucipes among my strawberries, and they are going to Kew as it is a rare species. Edibility is unknown. Leucocoprinus birnbaumii is a spectacular tropical fungus I found in my indoor chilli pots. I have seen Macrolepiota species at Kew Gardens, possibly introduced on purpose. And I am sure Yellow Stainers, Agaricus xanthodermus, which look like supermarket mushrooms, could be found, and would give someone a nice stomach ache. You could also get some deadly Amanitas in undug beds, if trees are nearby, not to mention the deadly Clitocybe rivulosa. I have had wood blewits (edible) on my lawn, probably associated with a nearby hedge, and friends had some nice Agaricus species on a compost heap. It would be nice to hear if you only get edible Agaricus species, I am not sure what yours are from the photo, A. bisporus maybe.
It is interesting that your no dig approach might be favourable to fungi. As you probably know, some fungi grow in association with shrubs and trees, the mycelium growing around the roots, fo years if not decades or even centuries, so no dig would allow the fungus to live undisturbed.
On a side note, my new no dig beds are soon to be spread with compost. The ones created earlier this year did okay with butternut squash, not so well with beetroot, but I have heard a lot of people had issues with beetroot this year, presumably due to a late season. Not having to dig was a welcome bonus.
