Some more observations:
The man standing 4th from the left, middle row, appears to have the same collar badges with the T below.
The two on each end in the back row appear to have been added to the original picture. Their heads have been cut out and the 'patina' of their images is different to the rest
Any chance of a close up of the man seated 2nd from right please. His collar badges seem to be unique in the photo?
Thanks. Cheers,
Alex