The House of Lords

Peerages are regarded as responsibilities to live up to, rather than rewards that have been earned. This is true not only for those who receive their Peerages by inheritance but also for those of new creation.
Due to their high status and hereditary nature, the greatest of care and deliberation is given to any proposition of elevating a person to the Peerage, and they are thus never bestowed procedurally.
To use one prominent example, Great Officers of State sit in the House of Lords during their tenure, and enjoy the courtesy style of a Lord of Parliament, but are far from guaranteed being created Peers in their own right, barring exceptional promise that theirs will be a family which can be entrusted to carry the honour, dignity, and duty of that rank.
Owing to the unique nature of ennoblement it is kept insofar as possible out of the political sphere, and is therefore retained as the personal gift of the Sovereign. The Lord Chamberlain is the most likely to tender advice to the Sovereign in matters regarding the suitability of particular candidates, though in this sphere no advice is ever binding on His Majesty.
Vote tabulation in Parliament is based on an electoral system. The Parliament as a whole consists of eighty (80) electoral votes, with twenty (20) assigned to the House of Lords, and sixty (60) to the House of Commons. These electoral votes are applied to a potential Act-of-Parliament in proportion to their votes in their respective Houses. Since forty-one (41) electoral votes are the minimum Parliamentary majority, this means that the House of Commons alone can conceivably pass Acts-of-Parliament, with a 68.3% majority of its membership. The Sovereign, however, may be more hesitant to grant His Assent elevating such an Act to a forceful Statute if it has no support at all in the other House; such issues are taken case-by-case.