Hello.... a few people were trying to identify the person in the middle of this photo. This is Harald Seabrooke-Smith, my maternal grandfather, who was with Imperial Airways and helped organise these flights.
http://upload.wikimedia.org/wikipedi...r_Abkommen.jpg
If anyone is interested I'd be happy to send some other photos of him through - there's no mistaking him with those ears!! I can see the likeness with the South African mentioned above, but that's not him.
Hope that's of interest to others - if anyone has any more information about Harald Seabrook-Smith then I'd be very pleased to receive it. He died when I was very small and I so never met him, but family history is always fascinating.