@ Vim Fuego
The five O-level entry was for a direct entry commission on the supplementary list for 16 years or to 38th birthday with terminal grant & pension, whichever was later, with opportunities to leave with a gratuity after five years (for some, not Hunter pilots though) clutching £750, eight years (£1,500) or 12 years (£3,000). Promotion was only to Sdn Ldr, with possibilities of selection for a permanent commission on the general list (possible promotion to the highest ranks), or a permanent commission on the supplementary list (possibly to Wg Cdr). Cadet entry to the general list needed 2 A-levels.
Much more important NCO aircrew such as yourself needed O-level Eng. Lang. and Maths only.