Law /
Status of Protocol 12 to the European Convention on Human Rights [63]
British citizens born outside of the UK and with no link to the UK do not pass on citizenship, as far as I'm aware.
Not normally. I know a family who had this issue, which they were able to resolve in the end. There are quite complex patriality rules necessitated by the legacy of Empire, and there was a cut-off date a few years ago for those who wanted to establish citizenship through a grandparent, however even those who can establish it through a parent can have certain issues with healthcare and welfare, student tuition fees etc.
Worth stressing that the above only applies to those who actually have paperwork to prove their claim. I doubt many/any people have ever suggested that the state is hiding the proof from them!
the OP should begin by taking a case in W-Wa Srodmiescie, where I think the relevant USC for foreigners is.
This makes sense. If he's a
legal eagle he could petition the court himself assuming he can get into Poland legally, if not, he should hire a good immigration lawyer.