Gay conversion therapy is a fiercely-contested topic - advocates claim it's not harmful but it's been condemned by UK health organisations. BBC's Benjamin Zand gained exclusive access to a seminar in London which looked at controversial gay conversion therapies. There had been calls for the conference, which was billed as "exploring unwanted same-sex attractions", to be banned - with campaigners saying there should be no place in the UK for people to teach that being gay is something that's wrong and should be cured. Earlier this month President Obama called for an end to 'gay conversion therapies' in the States. In the UK - gay conversion is NOT illegal - but various health organisations - including NHS England and the Royal College of Psychiatrists - describe the treatment as "potentially harmful and unethical". So should it be banned? You can watch more Victoria Derbyshire films here Watch more films here bbc.in/1P39x2K Subscribe to BBC News HERE bit.ly/1rbfUog Check out our website: www.bbc.com/news Facebook: www.facebook.com/bbcworldnews Twitter: www.twitter.com/bbcworld Instagram: instagram.com/bbcnews