UK, Ireland / Insuring & driving a car on French plates from UK to Poland [7]

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Car insurance for a UK resident in Poland

hi i am 21 and live in the UK but i am looking to insure a car in Poland as my girlfriends family live there. but i cant seem to find out if i can insure a car in Poland whilst living in the UK but also i would like to know if when i go there would i be okay to use someone else's vehicle if they have AC or OC insurance.