No, both houses are chambers of Parliament and both should agree on legislation before it becomes legal.
While often criticised, the Lords does in fact, generally do a pretty good job. Many bills are revised, and errors corrected after going through the Lords. The Lords is most useful for introducing certain bills that are likely to be controversial, b... ut can then avoid sensitive part politics, e.g. The Human Fertilisation and Embryology Act 1990. While not elected, Lords are chosen by the Crown (government) to sit due to their good deeds and contribution towards the country. So the likes of experts typically sit in the Lords.
And as suggested, the Lords, while made up of members of the three main parties, is generally much LESS about party politics and much more about doing actual good. And while parties do sit in the Lords, many independents (much more than in the Commons), also sit in the Lords. So think, should members of Parliament, who are often experts and have great knowledge, have their vote swept aside by the Commons