Nicotine salt e-liquid regulations in the UK
https://ace-wiki.win/index.php/Nicotine_salt_e-liquid_regulations_in_the_UK
The UK's approach to nicotine salt e-liquids is pretty specific—they're covered by the same rules as all nicotine products sold here. Bottles can't exceed 10ml for the 20mg/ml max strength, and bottles over 10ml are capped at 20mg/ml freebase, not salts. Tanks are limited to 2ml capacity too. It's designed to balance safety and access, so you can still get a smooth, strong hit from Nicsalts but within these tighter packaging and strength limits.