the Mill

A closer shot of Belper Mill showing some of the ledges frequented by the peregrines.

The RSPB says: Suitable nesting sites restrict peregrines to areas where cliff-ledges, quarry faces, crags, or sea-cliffs are available. Recently, they have started to use man-made constructions, especially tall buildings. This building is a perfect urban substitute and the surrounds provide the extensive open terrain needed for hunting.

So they are happy and I am happy that they are here :)