Its not just Brexit related as most of the products were coming from outside the EU anyway, its mainly COVID. I spoke to the owner of 1 well known retailer who said that the costs of shipping have sky rocketed. A container which would have cost $3000 now costs $14000. Similarly, air freight prices have gone up. Add into that companies like Nuprol snaffling the distribution rights to lots of brands and then choking the supply on purpose and you have the shit show we have now.