I'm not sure this will actually end up changing much because of how they've carved out exceptions for refillable or rechargeable devices. I don't vape nicotine but I occasionally buy a disposable THC vape, and nearly every one of them is technically rechargeable despite the fact that the charge generally lasts the life of the cartridge and there's no use for it afterwards. I wouldn't be surprised if UK vape vendors simply make minor changes to be compliant without really changing the product.