A former Liberal Democrat MP has taken ecstasy for a Channel 4 show, which examines the effects of the class A drug.
Evan Harris joins a host of previously announced names, actor Keith Allen and novelist Lionel Shriver, in the controversial show.
Drugs Live: The Ecstasy Trial sees the participants given MDMA or a placebo before being placed in a brain scanner on two separate occasions.
Dr Harris, who lost the seat for Oxford West and Abingdon in the 2010 general election told the Radio Times:
Dr Harris said that he wanted to find a dose that could treat depression in patients without giving the patient a 'high'.
The study is being led by Professor David Nutt, the UK's former chief drugs adviser who was sacked after criticising government policies.
Channel 4 commissioner David Glover, defended the programme saying that he "obviously don't want to be part of glamorising drug use". He added:
Among those taking part in the show, a female vicar and ex-SAS man who have not yet been named, have been previously criticised by Julia Manning, chief executive of independent think-tank 2020 Health as "reckless and pointless".