Thanks to Lee for that memory prompt.
The original 'memorial plaque' to the 5th Battn (Hackney) Royal Berkshires can be seen at this very good site:
http://www.normandie44lamemoire.com/...rnierus2.html#
It is number 1 (the top one) and click on the 3rd magnifying glass (i.e. far right) for another picture of the memorial plaque.
Despite the text saying No. 3 Beach Group, the actual plaque has it as No. 8 Beach group.
Ian