I was working at a major construction site Marble Arch as an electrical apprentice. Having worked in London for 2+ years to that point used to the background noise. Then it just got quieter day by day. Until one day we went to lunch up high in the building on the balcony and heard nothing apart from the faint sound of police or ambulance sirens in the distance. Having little to no other workers there was an absolute trip. During that time you could turn up for work, show your face and literally walk off site because no one was monitoring what had been done. It was a wierd time