Hi Drewe,
At the TWU in the 1970s Hunter F6 XE653 carried the tail fin code '28'.
Not sure if this was the one that took part in the hi-vis trials. She is still flying to-day at Thunder City, SA.
Regards,
Richard
Ken,
If you use a book search site such as www.abebooks.co.uk and search for Canberra/Halpenny you will find loads of copies, brand new, at various sellers for about £16 (+ p+p).
regards,
Richard