Have you checked their websites?
https://www.habsboys.org.uk/BursariesQuote:
As a guide, free places may be awarded where total assessable household gross income is below £30,000. Where an offer of a free place is made, and a student uses the school coach service this will also be subsidised. The ceiling for eligibility for financial support is approximately £70,000 gross. Between these two figures contributions towards fees will be on a sliding scale. At 11+, awards may also take account of academic merit, and can be offered in conjunction with an Academic or Music Scholarship.