I have seen the arguments against this levy and I don't agree. Of course, there are the usual suspects who claim it is an example of the government dictating people's lives. This argument does not fly because being "free" does not mean being free to pollute at will. The other argument says that, if people cannot get plastic bags easily, it will reduce impulsive buying. Of course, this argument fails to take into account that money not spent today is still available to be spent tomorrow, so the net result on the economy is zero. At a time when the government is slashing subsidies for renewables in general and making life much more difficult for producers of biogas specifically, we badly need more regulation of these plastic bags, which everyone knows are poison to nature (in some cases, literally).