The first official garden popped up at a London Underground station more than a century ago. Now, there is an annual In Bloom competition, run by Transport for London (TfL), for the many stations going green.
With plants grown in everything from used mayonnaise pots to old food delivery crates, makeshift station gardens are sprouting up around the capital, all managed by volunteer staff. Competition categories include the best indoor garden, best fruit and vegetables, best hanging baskets and best window baskets.