Btw just for interest best comprehensive and grammar schools in the country by virtue of number of students going to Oxford or Cambridge:
Queen Elizabeth’s School, Barnet - 22%
Colchester Royal Grammar - 19%
Reading School for boys - 17%
Colyton Grammar School - 15%
Tiffins Girls’ School, London - 15%
King Edward VI Camp Hill School for Boys had 15.8% of their students going to Oxbridge, just for reference