Who's who in this 1940 wedding photograph

Hi all,
The attached wedding picture was taken in England in May 1940.
The picture was taken at Roy Marchands wedding. Roy served with 73 squadron in the Battle of France and Britain. However, I don’t believe any in the picture have a connection to 73 Squadron.
Over to you guys………
Thanks in advance for any assistance you may be able to offer.
Gerry