An amendment is a proposed change to the content of a Bill or to the text of a motion. MPs and members of the House of Lords may table amendments before a Bill or motion is due to be debated. It is then published in the notices of amendments or in the Business papers.
In the Lords, any amendment that has been tabled may be debated or voted on; in the Commons, only those amendments selected by the Speaker or chair can be debated.
The final stage of a Bill before it receives Royal Assent is often a process known as Consideration of Amendments. When a Bill has been passed by one House but then amended by the other House, those amendments must be considered by the first House. There may be some to-ing and fro-ing between the Houses before a final version of the Bill is agreed.