I cant find BA's 1970s livery pics at HKG not on google not at any popular aviation photography sites, even those of BOAC are few and on tarmac only, no landings or low approaches over Hong Kong city, but BA Negus livery ones dont seem to exist at all from that era,. strange. Did BA quit Hong Kong during that period? only Landor livery and world tails appear from the past schemes.