I was out in the garden today and I noticed a bird flying into a gap between the bricks and the wood at the top of the wall in the back garden. I’ve never noticed before but there appears to be a series of vents along this area, I then noticed another bird flying into one of the other vents and I could hear what sounded like chicks. I looked in the attic and I couldn’t see anything, but it’s only partially floored so I’m not sure. To be honest I don’t mind having them, but I’m interested to know if they’re actually nesting in the attic or are they in a gap in between.