Finding the soulful in the soil-less

- when a bag of lettuce can be both the problem and the solution

A couple of weeks ago I left the SOIL exhibition at Somerset House absolutely buzzed up with thoughts about the vital role that the land plays in feeding us and how nourishing - in the very broadest sense - soil can be. Then, exactly a week later, I was part of a lettuce harvest in an office block in central London with not a scrap of soil in sight but…