Do you not think that these goods are available in Poland? If I were you I would sell them in the UK and buy new in Poland.
DON'T ditch your electricals, they are of course available in Poland but for 4zl a shot you can buy a new plug in Carrefore (maybe cheaper elsewhere, people?), cut off the old plug and rewire them.
There is no polarity per se, so you wire the blue wire to one plug pin and the brown wire to the other. SIMPLE! I did this with everything except stuff which needs a transformer and tbh I wish I'd brought some goodies I gave away like my footspa bath!
BTW you're not moving from the Leamington Spa area with space for a couple of boxes of books are you? (Don't ask, don't get :) )