One of the things I've discovered since becoming a garden designer is that wherever you are - in the countryside, in the city, walking down your local street or away on holiday - you always have your green antenna on.
On a recent visit to the Tate Modern we went up to the brilliant 10th floor viewing platform in the Blavatnik Building extension. After I'd had my fill of staring into the flats opposite and admiring the modern furniture and tasteful decor my eyes were drawn to the green spaces down below. I loved the shapes, they felt really sketch-like. As if someone had gone over an architect's drawing with a bright green pen.