Beautiful school with a strong focus on the sport. This is a boarding school (children can live there), so they do it all the time - the British like to not waste a minute.
There are two main kinds of sports (football and tennis). If you do not want to practice professionally, you can not do it (although this is very welcome), but other sports sections (they are already a choice in a variety of options) are mandatory only if there is no exemption from an officially licensed doctor (and most likely they will register swimming, pilates and something else).
As a separate bonus, I note the proximity to Brighton: I have been studying there for some time. Beautiful sea resort, beautiful and developed (at the same time, not noisy and not dirty).