When the sun comes out, Londoners head to the parks by the thousand.
But all that extra use has taken its toll on the Royal Parks deckchairs, and there's more hot weather on the way, so 6,720 of them will have their old canvas stripped and recycled into reusable bags. .
That means two miles (4,700 metres) of new canvas has had to be ordered. Enough to stretch from Buckingham Palace to Primrose Hill.