I one of books with biographies of Polish airmen flying in UK and KIA/MIA during WWII I have come across an interesting information that details of their losses may be found in certain Air Ministry Orders, for example: Order no. P-355430/40 - regarding Sgt Egierski killed on 13/14.10.1940 or Order no. P-376334/42 - regarding Sgt Furmaniak shot down on 5/6.12.1942.
Does anyone know if such Orders (or perhaps rather Reports?) may be found in National Archives at Kew and what reference they may have?
Any assistance would be appreciated.