Carol,
that link doesn't give any information - sorry.
Re Kingstown/Dun Laoghaire- I asked re that point earlier. The earlier Chas Cook photos that are online (very rarely it seems to be) have the name written on in white ink.
The C Neville Cook have an imprint from a stamp so I would have thought that it could just be changed to the new town name - maybe not

Perhaps local library archives at Dun Laoghaire may be able to inform whether it was necessary that everyone swapped over at the same time.
Also, if the participators in the procession are as we have discussed - I wonder why the civilians/scouts/ other young uniformed and a fire tender with firemen are there but no large military presence.

Elsewhere, there is a film of some firemen's funerals but they had a large turnout of firemen in procession -accompanying the hearse etc.
The trouble is we don't know what has already passed by in the procession.
I don't suppose there are any Cook family still around in D L as photographers to tell us when the company ceased trading etc.