<P> The twelve Law Lords did not all hear every case; rather, after World War II cases were heard by panels known as Appellate Committees, each of which normally consisted of five members (selected by the Senior Lord). An Appellate Committee hearing an important case could consist of more than five members . Though Appellate Committees met in separate committee rooms, judgement was given in the Lords Chamber itself . No further appeal lay from the House of Lords, although the House of Lords could refer a "preliminary question" to the European Court of Justice in cases involving an element of European Union law, and a case could be brought at the European Court of Human Rights if the House of Lords did not provide a satisfactory remedy in cases where the European Convention on Human Rights was relevant . </P> <P> A distinct judicial function--one in which the whole House used to participate--is that of trying impeachments . Impeachments were brought by the House of Commons, and tried in the House of Lords; a conviction required only a majority of the Lords voting . Impeachments, however, are to all intents and purposes obsolete; the last impeachment was that of Henry Dundas, 1st Viscount Melville, in 1806 . </P> <P> Similarly, the House of Lords was once the court that tried peers charged with high treason or felony . The House would be presided over not by the Lord Chancellor, but by the Lord High Steward, an official especially appointed for the occasion of the trial . If Parliament was not in session, then peers could be tried in a separate court, known as the Lord High Steward's Court . Only peers, their wives, and their widows (unless remarried) were entitled to trials in the House of Lords or the Lord High Steward's Court; the Lords Spiritual were tried in Ecclesiastical Courts . In 1948, the right of peers to be tried in such special courts was abolished; now, they are tried in the regular courts . The last such trial in the House was of Edward Russell, 26th Baron de Clifford, in 1935 . An illustrative dramatisation circa 1928 of a trial of a peer (the fictional Duke of Denver) on a charge of murder (a felony) is portrayed in the 1972 BBC Television adaption of Dorothy L. Sayers' Lord Peter Wimsey mystery Clouds of Witness . </P> <P> The Constitutional Reform Act 2005 resulted in the creation of a separate Supreme Court of the United Kingdom, to which the judicial function of the House of Lords, and some of the judicial functions of the Judicial Committee of the Privy Council, were transferred . In addition, the office of Lord Chancellor was reformed by the act, removing his ability to act as both a government minister and a judge . This was motivated in part by concerns about the historical admixture of legislative, judicial, and executive power . The new Supreme Court is located at Middlesex Guildhall . </P>

Who has more power house of commons or house of lords