Also, for the benefit of the uneducated (
) I shall translate the RAFs height system:
Angels = 1000s of feet
Cherubs = 100s of feet
So, a bandit at Angels 5 would be at 5000ft and a bandit at Cherubs 4 would be at 400ft.
EDIT: I believe Cherubs is 100s of feet, TBH I don't think the RAF actually used Cherubs but I could be wrong.