An independent school in London:
http://www.faradayschool.co.uk/Admissions/Fees/
http://www.faradayschool.co.uk/Term-Dates/
Three terms a year at about $5,000/term comes to about $15,000/year.
Interesting. Tiny school, only 92 students for eight years of students.
Kind of like a modern one-room school in London. They must have tiny classes.
Of course top level urban centers tend to be more expensive.