I understand, I did read the article it states sometime in the future we will tell you how we came about these numbers.
I put a bit more faith in the people that were there at the time counting than I do academics in libraries counting 60 years later. We can disagree. Either way, even if it was 2499 that is a somewhat low number given the tasks. And we will probably also agree, whatever the number, they were each and every one a great unselfish sacrifice.
I read an account about the gal who was researching this and it was impressive. She pieced together from reports and firsthand accounts the names and units of those killed. I understand that the new figures include Rangers and others who died the first day further inland, something that the old numbers didn't.