/ Getting the most from my hard earned money (transfer money from England to Poland)
Why is it that people who know nothing seem to insist on making so much noise?
Polish-residents are taxed on their worldwide income (unlimited tax liability), whereas non-residents only on the Polish-source income (limited tax liability). An individual is considered Polish-resident if the center of his personal or economic interests (centre of vital interests) is located in Poland or if he stays in the territory of Poland for more than 183 days in a tax (i.e. calendar) year.
Foundation Centre of Tax Documentation and Studies in Lodz
If you are paying taxes in the UK, you most probably won't have to pay taxes in Poland but you need to tell the tax office that you are paying those taxes and you need to prove that the taxes are paid.
But with all this said, I have no idea why you don't just set yourself up as a dzielnosc gospodarcza in Poland, invoice your UK employer and then only pay 19% tax (with lots of deductibles!).