Do I need to have a driving license issued by the DVLA in United Kingdom if I am a permanent resident there?
What are the implications if I do not change to UK driving license?
According to the Gov.UK website, as an EU national:
You can drive in Great Britain on your full, valid driving licence until you’re 70, or for 3 years after becoming resident in Great Britain, whichever is longer
The exception to this is if you got your EU licence by exchanging your non-EU licence. In that case you can only use it for the first 12 months of residency before you must exchange it for a UK licence. If the licence you exchanged for an EU licence was not from a "designated country" then you'll need to take a UK driving exam to get a UK driving licence after the first 12 months.
You can keep your own license as long as it is valid or the validity period in your new country of residence (what ever comes first). When you have to renew you license, you have to renew it the country of residence. Full details of the EU license see the following link. Excerpt:
If you move to another country, you can drive there with your current licence as long as it remains valid.
You can have your licence renewed (or exchanged from a licence issued by another country) only by the authorities of the country where you are residence.
They will exchange your original driving licence for a local one. You will then be subject to the same rules as nationals of that country regarding validity periods, medical checks and so on.
Poland is part of the European Union, as such you can drive any type of vehicle listed on your full and valid licence.