A survey commissioned by Southwark recorded hedgehogs on five consecutive nights. It said:
[...] [The] terrestrial habitats [of Greendale] [...] provide similar foraging and sheltering opportunities for hedgehog. These habitat types are also likely to support an abundance of key food sources for hedgehog including invertebrates such as beetles, worms, slugs, millipedes and caterpillars.
More information from the survey here.