My answer would be to buy from the experts. Yes, DIY is cheaper, but you don't want to be potentially jeopardising your health. Excuse the analogy, but if you do not service your car and then it, god forbid, gets you into a serious car crash, you are partially to blame. Same goes for eliquids if you have no idea what you are doing. I have started purchasing eliquid from reputable UK eliquid manufacturers.
Actually, DIY can be safer. (Note the word "can")
There are lots of UK e-liquid companies who do not test their liquids, sell liquids with diacetyl and use unknown colourings as well. Going to "Premium" brands doesn't protect you. The latest discoveries of rogue liquids have all been premium.
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