I seem to recall them saying it was to put the flavourings/concentrates apart from anything with nicotine in it - something to do with being ready for the upcoming TPD implementation.
They keep anything containing nicotine separate - if they continue selling ready made liquid, it'll need changing to 10ml bottles I suppose, and the base liquids containing nicotine will cease to be sold ...I assume.
If we get no limit on quantity of 10ml bottles, and 'quantity' deals are introduced to keep prices similar to now, I may still buy some ready made.
I'll continue buying 100ml bottles ready-made and nicotine containing base until it has to stop. After all, over £30 is shipping free.
With the concentrates and non-nicotine items, the shipping is still reasonable, and still free over £30 if you were to buy concentrate & plain base in bulk.
It would be good if they could sell small bottles of nicotine to dilute with plain base after the TPD comes into law, but heck, we won't be allowed anything hazardous
....and they wonder why we voted to leave!!!