What makes a UK high school prestigious?

Can anyone run me through the top prestigious high schools in the UK? I'm trying to understand what makes them prestigious - is it their academic ranking, faculty, extracurriculars? Thank you for your help.

When talking about prestigious high schools in the UK, often referred to as "public schools", a few common factors come into play.

1. Academic Excellence: High academic achievement is a significant factor. Top schools often have a high percentage of pupils achieving top grades at GCSE (General Certificate of Secondary Education) and A-Level exams. They also regularly send students to Oxbridge (Oxford and Cambridge Universities) and other top universities worldwide.

2. History and Tradition: Some of the most prestigious schools in the UK have a long history dating back centuries. The sense of tradition, including classic architecture, longstanding customs and rituals, and an array of notable alumni, adds to their prestige. Eton College and Harrow School, founded in the 15th and 16th centuries respectively, are two examples of this.

3. Extracurricular Opportunities: Prestigious schools offer a wide range of activities outside the classroom. This includes cultural activities like music and drama, various clubs and societies, and an array of sports. The breadth, depth, and quality of these opportunities make these schools highly sought-after.

4. Faculty: Strong faculty is another key aspect. Teachers at these schools are typically very knowledgeable, experienced, and effective in fostering a learning environment that helps students excel.

5. Facilities: Lastly, prestigious schools often have excellent facilities. This can include everything from advanced laboratories and technology, to beautiful campuses, well-stocked libraries, and sophisticated sporting facilities.

Names that often come up when discussing prestigious UK high schools include Eton College, Harrow School, Rugby School, Winchester College, and the Westminster School, among others. However, keep in mind that what is "best" or most prestigious can vary significantly depending on a student's individual needs and goals.