I am flying transatlantic tomorrow, from Heathrow T5. I have hardly flown since before Covid and am excited about the duty free make-up, perfume, etc. I have also been saving for a new bag and am considering investing in a label like Louis Vuitton (I like the Neverfull). Is duty free still worth it for this kind of thing? I get confused by all the tax rules and am not sure whether you actually save much money anymore.