[Nick Beale]

I have noticed several cases where the end of month total doesn't quite match the corresponding 10-daily order or battle figure.

Anyone with an office job will have run into this kind of thing - the example you quote would probably depend on whether the report for 30 June was compiled that day or on 1 July.

Ultra messages sometimes give day-by-day strength/serviceability for units on a given airfield that go up and down apparently at random - I guess it was just a case of faults developing and being fixed and that the picture could change almost by the hour.