A decades-long, still-ongoing project – History of Parliament Online – presents over 21,ooo biographies of members of Parliament from 1386 to 1832. Many of these contain in-depth explorations of a member’s political life, supplemented by both links and footnotes to original sources; however, some just offer a barebones outline. In addition, this site contains entries on constituencies, histories of parliamentary sessions, and surveys (overviews) of major themes dealt with by the various parliaments. A treasure trove of information; well worth a perusal.
History of the British Parliament