Conversation so far:
What types of hereditary peers existed?
Conservative hereditary peers.
What is the definition of Conservative hereditary peer?
CANNOTANSWER.
What is the role of a hereditary peer?
peerage was sometimes seen as an impediment to a future political career.
How was it seen as an impediment?
Hereditary peers elected hold their seats until their death, resignation or exclusion for non-attendance.
Did they have any other roles?
CANNOTANSWER.
Are there any other interesting aspects about this article?
two by the Labour hereditary peers, three by the Liberal Democrat hereditary peers, and 28 by the crossbench hereditary peers.
Was that a reference to the House of Lords?
In 1999, the House of Lords Act abolished the automatic right of hereditary peers to sit in the House of Lords.

Question: Is there any additional information about the peer roles in the House of Lords?
Self-contained rewrite: Besides the 1999 House of Lords Act, is there any additional information about the peer roles in the House of Lords?