Sankey began his practice as a
barrister in south Wales, later specialising in workmen's compensation cases. In 1909 he was appointed a
King's Counsel. Sankey became a judge of the
High Court, King's Bench Division, in 1914. In 1919, Prime Minister
David Lloyd George appointed him to chair the
Sankey Commission into the
coal industry, which recommended a seven-hour day for miners and the
nationalisation of the industry. He was appointed a
Lord Justice of Appeal in 1928. On
Labour's victory in the
1929 general election, Sankey was appointed
Lord Chancellor by
Ramsay MacDonald, He was one of the few Labour politicians to follow MacDonald into the
National Government in 1931, and served as Lord Chancellor until 1935, when
Stanley Baldwin re-entered office. In 1932 he was created
Viscount Sankey, of Moreton in the
County of Gloucester. Several of his judgments in the House of Lords have become landmark statements of law. Sankey's judgment in Woolmington v DPP|
Woolmington v DPP [1935] AC 462 is famous for iterating the duty inherent on the prosecution to prove the prisoner's guilt beyond a
reasonable doubt. In pertinent part, his judgment stated: Throughout the web of the
English criminal law one golden thread is always to be seen – that it is the duty of the prosecution to prove the prisoner's guilt subject to what I have already said as to the
defence of insanity and subject also to any statutory exception... This judgment is usually referred to as the "golden thread". Sitting in the
Judicial Committee of the Privy Council, Lord Sankey gave decisions in significant
Canadian constitutional law cases. Of particular note is
Edwards v. Canada (Attorney General) (often referred to as the Persons Case). In his decision, Sankey affirmed that women are eligible to be appointed to the
Senate of Canada. In his analysis, he set out the
living tree doctrine of constitutional interpretation that has become a foundation of Canadian constitutional law. In another significant decision, the
Aeronautics Reference, Sankey held that the
federal government had exclusive regulatory jurisdiction over aeronautics. == Sankey Declaration ==