went to see more gardens; there was a lovely one on top of the Ham Yard hotel - partly just a relaxing outdoor lounge for guests with lots of plants in pots and planters, but also a kitchen garden for producing their own fruit, herbs and veg - small and crowded, everything only about a foot deep but stacked vertically with lots of espaliering and so on. The herb garden was on the sloping roof of the garden shed.
We found a Whole Foods Market round the corner - you just get a cardboard dish, fill it up with the ingredients on offer (about 30 options) and pay by weight. I had no idea there was so much healthy food around.