As far as I know, Colchester would admit only one HK student thro Academic Asia each year. One HK student with 9A school cert result was admitted by Colchester last year!
My friend always booasts his 9A son and her son eventually gave up the offer from Colchester and continued his study in HK. In the coming Sept. he will study HKU.
Apart from Colchester, another state boarding school Reading ranks 19th in this year which surpasses many public schools like Harrow, CLC, Charterhouse etc and its Registrar Mrs N G Douglas is very sincere indeed.