Over night stay for a Harry Potter visit. We were put on 4th floor, can could hear the noise from train/tube station, once this stopped we noticed the aircon unit was very load when it kicked in, which was hourly! We couldn’t turn this off due to the switch on control been broken, so didn’t sleep as when it kicked in, noise was so loud. The next morning as we started to get ready, we saw a bed bug on the pillow of the sofa bed that had been set up! Then noticed another on the main bed pillow we had slept in! We couldn’t get out of the room fast enough. Staff were nice and when we raised the issues they gave a full refund, but this experience ruined our whole day, due to fact we couldn’t stop itching and just wanted to get home.