Te skladki ci nie przepadaja (i nie da sie ich "odzyskac"); okres kiedy pracowales w ktoryms z panstw unijnych masz zaliczony do emerytury.
Basic rule – You pay contributions in the country where you work
If you work in another EEA country or Switzerland for an EEA or Swiss employer (this includes a UK employer), you are usually insured under the social security laws of the country you work in.
Coming to the UK from European Economic Area Countries
(...)
European Economic Area rules mean that if you do not hold an E101 or E102 you will be required to register for a National Insurance number and pay National Insurance contributions on the same basis as a person who normally lives and works here.
Tyle ze stron brytyjskich. Koordynacja tych spraw zajmuje sie w EU EUlisses:
http://ec.europa.eu/Your cover
Each EU country, Norway, Iceland, Liechtenstein and Switzerland stores your periods of social insurance cover until you apply for your pension.
Portable pensions
You can take your pension and healthcare rights with you when you move to another EU country, Norway, Iceland, Liechtenstein or Switzerland.