Independent schools are by far one of the finest institutions offering education without the interference of any kind of external body and institution. Applying to such a school if someone is moving from state edition school can be tough but not impossible.
Many independent schools have their criteria for taking in new students. They set up high standards in terms of academics so that no lacking students get to be part of their prestigious educational body.
There is a financial clause also as a lot of independent schools ask for a massive amount of admission fees beforehand and that does not include the tuition fees.