As you walk round West Norwood, look up – you might see one of the most thrilling sights in nature.
The drastic decline of the peregrine falcon after the second world war was partly caused by widespread pesticide use, but stricter controls were introduced and the population recovered. In particular they’ve flourished in London, where tall buildings such as Tate Modern offer similar nest sites to the cliff ledges they prefer in coastal areas. And with feral pigeons abundant, there’s no shortage of prey.