British supermarkets should hang their heads in shame about palm oil and refuse to stock food that uses it. They're complicit whether they realise it or not.

Even so called 'ethical palm oil' just means that those that want it, and can't get it from an 'ethical supplier' because Western companies consume the supply, get it from "illegal" suppliers.

That's true for most cheap things, unfortunately. Externalities are not accounted for.