Brian Eustace is a retired police sergeant who introduced into British policing a self-defence and arrest system known as taiho-jutsu which was, until 1996, the method of unarmed self-defence used by police officers throughout the UK with the exception of the Metropolitan Police.

Brian was also an expert in a number of martial arts and founded the British Taiho Jutsu Association in 1975.

Brian authored a number of books on self defence and martial arts and was a past vice chairman of the Martial Arts Council of Great Britain.