LSD study uses 'high' volunteers
A group of 20 British volunteers are the first in the world to have had their brains scanned while high on LSD.
Early results are said to be "exciting" but the full findings must wait until funding can be found to complete the research.
The controversial study was co-led by ex-drugs tsar Professor David Nutt.
Nutt was sacked from his job as the UK government's chief adviser on drugs in 2009 after saying saying ecstasy and LSD were less harmful than alcohol.
At a briefing in London he spoke out against restrictions on research on recreational drugs, which he called "the worst