Buying goods online from EU

loobs40

I have in the past bought a certain brand of perfume from a French website and in the process saved a lot of money over buying it from a UK site. I would like to buy again from this site which will notionally save me about £55 after postage costs
However,  the big unknown after Brexit seems to be any additional custom charges I may be forced to pay  before receiving the item.  Does anyone have experience of this and maybe links to where i could find out how likely this is and the potential cost?

Update : i have found the article on this site referring to custom charges and it seems as the item is selling at below £135 i dont have to pay extra charges