Well done for volunterring your testimony Simmo, I appreciate it.
Its clear to me from reading what you've said that out of the millions of people who've taken drugs, there are various affects and outcomes for each chosen individual, though I note you state it wasn't actually cannabis that caused the damage, (hopefully not everlasting), and it was your choice to move on to the next thing.
Poiticians and lawmakers should be looking for improved outcomes for their citizens, regardless of whether they wear a halo or have actually tryed drugs, creating a better situation for the user and subsequently the rest of society (through realistic aims and objectives).
Its quite sad that the anti-drugs lobby want the status quo to remain. A status quo that is unforceable through an oxymoron which is the law, creates the illusion of protecting the public but as the same time has more users springing up then ever before in real terms. More users mean more so called 'one offs' who can't handle the drugs they take, and then because of this the anti-drugs lobby demands tougher laws.
The logic of their argument is increasingly looking like it doesn't have many legs to stand on.
If Cameron doesn't authorise this study he is a total bafoon, but it should be stated for wider purposes that it looks like if the Liberal Democrats had not been able to influence the Conservative government this would never have been on the agenda. I just hope the Labour party does the right thing on this issue (for once).