Over the last couple of years, I've been keeping half an eye out for what our peregrine(s) have been eating.
This has been a fairly common sight from the roof of the tower at some times of the year. The drainage chutes are used as a dinner table. This seems to be what's left of a pigeon.
Although pigeons seem to be the favourite bird on the menu, other things do seem to get eaten. This is the remains of a woodcock found on the tower roof on April 13th 2013. This indicates that that the peregrine was feeding at dusk or night with the help of artificial street lighting.
This pigeon looks comfortable!