Saying "Joe, thanks for that" in the corridor would get you a detention/isolation so they really are silent corridors. Not just quiet.
Theres silence in most lessons too. Each lesson senior staff patrol the school and check on every classroom to remove any disruptive children.
There is v little/no low level disruption as kids are ousted. However its a very marmite school. They're upfront about expectations on open evening though.
Every night 1.5 hours homework is set (mainly self quizzing). Every single night. In 30min slots, for evey slot not done the child has that amount of detention that night. So if they never did homework its 1.5 hours a night. (School point out it saves you policing homework.)
They have extra lessons after school/saturdays to help those behind catch up. They spend a lot of extra time helping those who cant read, read, but set extra homework so they spend more time reading.