It just seems like useful information that I reckon a large number of people would wish to know. Government would only prohibit chemicals that became a social problem. I can't imagine LSA containing plant-products like HBW or cacti being much of a social issue.
Having said that, such a list would have to be in the posession of responsible users only so as not to cause a social issue. The question of research chemicals also should be taken into account considering that we don't know much about them. Nobody knew the LD50 of Mephedrone when it first hit 'the scene', for example.
An A-Z list of psychoactives legal to posess, transport, and use in the UK must exist somewhere. If not then this'll take me a good day's research XD ahaha
TIME WILL TELL...