Right now, if you are planning to purchase or be in possession of Mephedrone in the UK you will not be breaking any laws. The main reason for this is that the Misuse of Drugs Act doesn’t have any restrictions when it comes to this drug. When discussing the sale of this drug though there are many more grey spots. According to the Medicine Act, it is considered illegal for anybody to be supplying, advertising or selling this drug for being consumed by humans. Still, there are quite a few vendors that side step this law by simply labelling the drug for research use or as food for plants and by mentioning on it that it is not to be consumed by humans.
A vendor can, though, sell this drug legally to a person as long as that person shows no desire to consume it himself/herself. If a vendor believes that you might be consuming the drug yourself, he/she will immediately stop supplying it to you. In countries like U.S.A, Australia, Sweden, Germany, Norway, Israel and Denmark it’s illegal to use or sell this drug in any capacity. But in UK the drug is not illegal and is also sold on the internet.