Based on our expert analysis, these ten schools are among the best in the UK for A-Level training: 1. Westminster School 2. Oxford International College 3. Cardiff Sixth Form College 4. Brighton College 5. Concord College 6. Ruthin School City of London 7. Canford School 8. Bellerbys College Cambridge 9. Wellington College 10. Marlborough College 11. Bishop's Stortford College 12. Freemen's School