Gina Miller, the UK fund manager who successfully challenged the government over its right to trigger EU exit negotiations without parliamentary approval, says politicians have wasted the opportunity she gave them to amend the Brexit bill.

Miller's victory in a landmark Supreme Court ruling forced Prime Minister Theresa May to put Britain’s exit from the EU to a parliamentary vote. On February 8, the House of Commons voted in favour of triggering Article 50 and two years of exit talks, which May plans to do next month.