I had some contract work in London for a number of months a few years ago, returning home at the weekends. I always stopped in the same hotel and always requested the same room as, because I tended to work away, I found it easier to settle into and sleep for the first couple of nights in familiar surroundings. One morning, several weeks into the contract, I had a number of small, itchy insect bites. I also found something resembling a totally rust red ladybird (dead!) under my pillow in a small squish of blood (my own!). I pointed this out to the hotel and they changed my room whilst a pest controller was called in. The hotel said that a French couple had been in the room over the weekend and that the bug, or bugs, given that I had only squished the one, must have arrived in their luggage. I was told that bed bugs are nothing to do with cleanliness, and I believed this as the hotel was always spotless, but, like ants, just arrive and set up home in environments which suit their survival requirements.