The separate Parliaments of Great Britain and Ireland were now abolished, and replaced by a united Parliament of the United Kingdom. Ireland thus became an integral part of the United Kingdom, sending around 100 MPs to the House of Commons at Westminster and 28 representative peers to the House of Lords, elected from among their number by the Irish peers themselves, except that Roman Catholic peers were not permitted to take their seats in the Lords. Part of the trade-off for the Irish Catholics was to be the granting of Catholic Emancipation, which had been fiercely resisted by the all-Anglican Irish Parliament. However, this was blocked by King George III, who argued that emancipating the Roman Catholics would breach his Coronation Oath. The Roman Catholic hierarchy had endorsed the Union. However the decision to block Catholic Emancipation fatally undermined the appeal of the Union.