Long gone from the RAF, but from my days, few aerobatics were "taught" at AFTS (Valley/Hawk). You "learned" aeros at UAS/EFTS/BFTS on Props/JPs/Tucano - and these types could do everything the Hawk could do and more in this area.
Yes - some conversion to Hawk speeds / techniques / gates, but not proper teaching. So not answering your question, but not sure what you have read is a big deal (if true?)...
NoD