Dr Filth,
I don't know how long it will be before the government releases them.
All files have different release dates depending on just how sensitive the information is deemed to be.
If it was up to me (but it isn't) i would release them now,but they obviously think them too "hot" still.
Oddly enough,from what I can deduce from the files that have been released,the restricted ones are more to do with our wartime allies than our wartime enemies.
However,I have said too much already!