Many thanks to you all for your kind and helpful input. In the course of reading your posts it jogged my memory as to where I last saw these aircraft with the dual ICAO registrations (one type face much larger than the other) towards the rear of their respective fuselages... Dubai and I believe the a/c’s belonged to Emirates. I’ll be back there towards the end of the year and will take my camera with me. (Not that I’m a spotter).
It was also interesting to read your comments to compare to the similarities with flagging of commercial ships.
All the very best.
EG
