It is a catch-22 situation. The school, high in academic league tables with excellent Oxbridge results, attracts involved parents who believe this is the golden path. The parents are eager to push their children into the school and begin preparation from an early stage. This creates a self-perpetuating cycle, attracting even more parents with the same mindset year after year.
On one hand, being high in the league table enables the school to charge higher tuition fees, possibly allowing them to spend more money on better facilities (you hope) . It also alleviates some pressure on school teaching
end about quality assurance for the academic progress of the students . If a student struggles or falls behind (or require additional push) , in addition to school, the highly involved, the implicit selection of the 'tiger' parents cohort are likely to step in and provide whatever support is needed.
On the other hand, despite competitive admissions, the school might try to create a less competitive environment to mitigate these effects. This could lead to disparities in the pressure experienced by different students. Naturally self-driven girls with supportive parents might thrive, while some may struggle.
With both the High Mistress and deputy Head departing soon for different reasons, it will be interesting to see how the school navigates this situation.