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The British security agency, GCHQ, says it's expanding its use of artificial intelligence to tackle increasingly sophisticated criminal activity in areas including child sexual abuse and people trafficking. The agency says it will use A-I to map networks operating on the dark web. But there are concerns. Newshour's Razia Iqbal spoke to Harriet Haslam-Greene, a former UK military intelligence officer, specialising in global counter-terrorism and defence strategy about how the UK intelligence services will be using this technology. (Picture shows the GCHQ building in Cheltenham, England. Credit: GCHQ)