I didn't know until Shelagh explained that this is known as Guerrilla Gardening, in fact there is a whole website that encourages gardeners to cultivate neglected public spaces.
This reminds me of the silver thistle like Eryngium giganteum Miss Wilmotts Ghost, named after the nineteenth-century gardener, Ellen Wilmott, who liked to secretly scatter seeds of the plant in other people's gardens. I don't think I'll go as far as to sow lettuces in a burnt out car, but I may be sprinkling a few more seeds round the village.
The back lane in winter
and in spring - point made, will you be joining the movement?