Back in the early 90’s I got a swarm in my chimney. I was cool about it and quite protective, but it all got messy in the warm weather when honey began running out the bottom onto the floor. It was a closed off chimney and was oozing out of the boarding. It all got sticky and became a pain to clear up every day. It was actually nice honey (in a sooty sort of way).
In those days people were less protective about bees. I contacted some beekeepers but they advised me to get rid of them.
It pained me greatly then, and it still does, I administered wasp killer down the pot. Most despicable thing I ever did I guess..