We really don't know how this will play out. Worse case is you'll not be able to buy anything on the market as stands. There is a good chance even if this does come into force it will be over ruled in court (there has been lots of cases over nicotine as a medicine and all courts have decided it isn't) I saw some TW bashing but they are likely to be the people putting up a lot of the money for case if this comes to pass. They did in the USA.
The way I see it is Government know they need tobacco tax money and the anti smoking lot know if enough people use ecigs their jobs would disappear.
If you are really interested
Clive bates is a good place to get the facts. He is an expert in harm reduction and public health who is fighting on the vapers side.