Nice idea for a thread, Spidge. And I hope people remember to include the Navy(s) and Air Force(s) units too.
To kick off here are the names of the Royal Navy personnel killed on D-Day and the week after:
http://www.naval-history.net/xDKCas1944-06JUN1.htm
I had never realised how many Royal Navy Commandoes had been killed on the day itself.