My DGP moved to the UK as displaced persons after WW2. I know the villages in Poland they came from but I don't have either of their birth certificates. I have their marriage certificate (married in the UK) and it gives their parents names. How do I go about finding out more information about them? I know so much information was lost in WW2, my DGP didnt speak at all about their life back in Poland due to PTSD. I'm not sure if Poland has a national records? Any advice? I live in the UK but I'm not able to visit their home towns as I have young children and limited finances.