what tracking? There is no tracking available at the Polish end. If you pay for tracking when posting from the UK then the tracking only works until the package leaves the UK, so that doesn't really help much.....
Tracking most certainly is available at the Polish end. I know this because a contact at Poczta Polska was able to track a parcel (admittedly sent USPS rather than Royal Mail), see the dates the postman claimed to have attempted delivery and left notification slips (as this is an office building, there was video proof of him attempting delivery two days later than claimed and refusing to leave a notification slip plus video proof that he hadn't been here on the second date), as well as tell me the post office the parcel was waiting at after the supposed delivery attempts.
However, that is very much the exception and not the rule. I estimate that about 10% of my parcels are stolen by Polish postal workers. Two of the three parcels posted by my family in the UK on or before 10 December have not yet arrived, along with one of the two parcels I posted on 12 December.
That Poczta Polska is not widely considered a national disgrace speaks volumes about Poland.