Contacted Vapable,
Kath there sent me the following link to the website.....
http://vapable.com/tobacco-products-directive-information/
Excerpt from it...............
'Nicotine
Nicotine in PG or VG for DIY e liquid mixing is the product we are least clear about at the moment. It is something of a grey area.
It will be illegal to sell e liquid at more that 10ml in size or 20mg in strength. However, nicotine isn’t e liquid and isn’t vaped alone.
Nicotine does have other applications, though not really for the general public. So again, we doubt that Trading Standards would allow retailers to sell nicotine alongside other vaping supplies. If this is the case, we may set up another separate business just for nicotine, if there is a demand from our DIY customers for the decent quality vaping grade nicotine that we currently are able to supply.'