What was the true extent of the use of polish born troops in the british army navy and air force


Hi i am wondering what is the extent of polish troops in the british military during ww2 and after i know about the more famous ones like 303rd and the 1st independent polish paratroopers but i am wondering what else did they do for Britain and the allies asking due to me doing my own research into my own family with my great grandad serving in the war first as a merchant sailor for the british and then in about 1942 he ended up with the SBS as a first gen commando with them serving all over Europe and Africa and he was eventually involved with operation paperclip during and after the war when he joined the GCHQ i hope the is an ok question thx for everything and for reading. Max