Re: Polish WW2 medals.
 

Appears to be a right mixed bag, there's UK decorations & Polish along with regimental badges & dog tags.

First one: Polish Army medal, 1939-45 Star UK - Cassino Cross (battle of Monte Casino Italy 1944), Defence medal UK, War medal 1939-45 UK, Cross of valour 1920.

Re: Polish WW2 medals.
 

As to the other bits & pieces Insignia (chest) Polish 3rd Carpathian rifle Division, the same but probably as a collar dog, Cap badge of the free Polish Army in UK, the last appears to infer Mountain troops (unit/trained) due to the "Edelweiss" emblem.

Re: Polish WW2 medals.
 

This looks like one of your father in law's (top left in first picture) but it's a rare version so yours may not be worth as much.

Army Medal for the 1939-1945 War (Medal Wojska za Wojnę 1939-1945) by Arthus Bertrand & Cie. of Paris

Re: Polish WW2 medals.
 

We have one just like that with the same inscription, but I don't know if it is one of the rare ones.

Re: Polish WW2 medals.
 

I think what makes it rare is the maker's mark on the edge: look at the small picture 5 on the link I gave earlier.

Army Medal for the 1939-1945 War (Medal Wojska za Wojnę 1939-1945) by Arthus Bertrand & Cie. of Paris

Re: Polish WW2 medals.
 

Those medals deserve to be mounted on a proper board behind glass, & on display, not kept in a cardboard box, Stanislaw risked his life in conditions very few people can imagine these days.
Retlaw

Re: Polish WW2 medals.
 

Insignia 3rd Carpathian Mountain battalion - 2nd Corps

Re: Polish WW2 medals.
 

Thank you very much to all who have contributed. We have been able to find out more about my wife's father. It helps a lot when you know what you are looking for.