The Libraries of the House of Commons and the House of Lords provide research, analysis and information services for MPs, members of the House of Lords and their staff. Research Briefings are a useful - and independent - summary of information related to legislation:
Hansard provides an edited transcription of what is said in Parliament, covering proceedings in both the House of Commons and the House of Lords.
Online access to Commons debates are available from November 1988: Hansard - House of Commons debates.
Online access to House of Lords Debates are available from November 1995: Hansard - House of Lords debates.
Hansard debates from both the Commons and Lords from 1803-2005 are available via ths website: Historic Hansard.