 A statement in the House of Lords on 13 May 1959 promised further reform , and a detailed White Paper was published in December . In November 1960 a Bill based on that report was introduced in the House of Lords , where it was much scrutinised by solicitors and barristers ( particularly at the Committee stage ) owing to its complexity . The Bill received its royal assent on 3 August 1961 , and passed into law as the Trustee Investments Act 1961 . 
