Is that missing who were later shown to have died or missing who were later POWs. I've recently been doing some work on 27 Bn RM in Holland in 1945 is that helps?
That's a bit trickier than the army because Royal Marines who were missing were commemorated on the memorial where their training depot was; so you can have a section of men killed the same day same place commemorated on several memorials in the UK. However... I have used Geoff's Search Engine and produced a list for you of all RM missing for 1.10.44-05.05.45 which should cover the period of Ops in Holland (its useful for some work I'm doing so it was interesting to do). It's attached as a Word document. You should be able to work out the ones killed in Holland from the RM units. If you need any help on that let me know.
