Don't look up!

The garden centre where we have Sunday Lunch has an open sided extension with a pitched wooden roof. There are at least two bird families nesting between the rafters and roof. This nest is on top of the light fitting - I think they are House Martins  as the parents don't seem to be big enough or have long enough tails for Swallows. In the opposite corner is, I believe, a Collared Dove's nest (extra pic)