Bryszkiewski - searching for my Polish roots

Good evening every one my name is Franciszek Bryszkiewski I used to visit this site a long time ago but life got in the way there might be people that remember? but those who don't;. My father fought in WW2 with the Polish Free Army but settled in the UK in 1946 he never got to go back to Poland but had planned to go in1976 but sadly passed away in 1975. I however managed to go in 2018 and saw his remaining family. I am researching his war years I have his records from 1946 in the UK from the Polish Resettlement Corps , but they have no records from 1939 -1945 they said I need to contact Poland if anyone here can give me advice on where to look I would be most grateful. Thank you