Parliamentary systems, as in Australia and the UK, blur the roles of the different parts of the governmental system. The majority party in the legislature forms the government (Le. executive) and thus is able to secure authority for its decisions where votes are on partisan lines. There may also be a lack of clear separation between the judiciary, the legislature and the government. In the UK, senior members of the judiciary sit in the House of Lords, the upper chamber, although by convention they have refrained from speaking on matters of controversy, and recent legislation has moved towards a separation of their powers from that of the legislature. Typically, the parliamentary system provides a mechanism through which major policy change can be enacted more swiftly than under a presidential system but as a result concentrates power in ministers, individually and collectively