Fergal and Reese went above and beyond.
Last summer, we had what sounded like small birds up above my son's room, chirping loudly every morning for about a month. We figured it was a nest. 8 months later, we heard some scratches from the same place one morning, and didn't want to risk having it again. So I called PPM about bird proofing and removing any potential old remains.
Fergal and Reese came out and inspected the whole house. Loft space was incredibly airtight and hot, Fergal came out breathless but he made sure to check everything carefully first. No remains and no sign of entry. The guys went out to the roof with a long ladder, really took their time up there. They even checked the back with a drone. Didn't find any signs of current or old nests. Thankfully, no rodents either.
They were very thorough, overall they were here for almost 2 hours. Since they didn't find anything, they advised me not to do anything. It's a large house and it wouldn't be right spending a lot of money to bird proof at random. It may have just been some bird having a laugh this time. If something does come up, I should take photos if I can, and call them. They can always come and assess what to do from there.
They did not charge a penny.
I feel much more comfortable now, and I will definitely be calling on PPM if and when we do get any unwanted visitors!