I doubt it because your parents don't have Polish citizenship. Do your Grandmothers have Polish passports?
It would appear to me that you are not really interested in becoming Polish but looking for an easy way to stay in the UK. Why don't you just attempt to seek citizenship directly from the UK? Your logic makes sense but it isn't as easy as it sounds. There is loads of paperwork and language issues that you have to deal with here.
Why don't you just do it the right way seeing as from your initial post -your words say
I am hoping stay permanently by acquiring Polish citizenship and therefore a passport in the EU.