Apologies in advance if this is not the appropriate place to ask, however I'd be extremely grateful for any assistance this community may offer.

On September 10, 1976, Croatian nationalists hijacked Trans World Airlines Flight 355 originating from La Guardia Airport in New York City. While one person, Officer Brian Murray, was killed in a related incident attempting to dismantle a bomb left by the same group at Grand Central Station, all passengers were eventually released in Paris.

Over the course of the hijacking, the terrorists required TWA to drop leaflets explaining their demands for Croatian independence over the city of London. TWA requested, and received, special clearance from London air traffic control for a TWA flight crew (in a TWA 727, I believe) to make a low altitude flight directly over the city and met the demand of the terrorists by dropping hundreds, if not thousands, of these leaflets. To the best of my knowledge, this TWA aircraft circled over London for up to 10 minutes while the flight crew dropped leaflets on the city below.

I've scoured the internet to find a high quality photograph, or any photograph at all, of this TWA aircraft dropping leaflets over London, but have come up empty-handed. I am hoping that someone here may be able to assist me by helping direct me to any known photographs of the aircraft over London.

Thank you for any assistance you may offer and again, my apologies if this is not the appropriate location for information on this topic!

tl;dr: I'm looking for Sept. 1976 photos of a TWA aircraft dropping leaflets demanding Croatian independence over London, UK in connection with the hijacking of TWA 355.

EDIT: If at all helpful or interesting, I can upload to IMGUR a scan of the original leaflet I reference.

EDIT 2: Scan of original Croatian hijacker leaflet dropped on London.