Korn has introduced more than 6000 plants to Covent Garden Playground, increasing the number of plant species from 10 to 150. Returning last week, the difference is already clear. The garden is alive, even on a cloudy September day, and busy with bees. “Where the children play, the seed bank is disturbed and new plants will grow” Korn explains when I meet him the following day. The planting has been designed with narrow runs, encouraging children to interact with the planting rather than be separated from it, another key ambition of Lacey’s.