Passing an Act of Parliament in the House of Commons

Bill is drafted 
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First Reading in the House of Commons
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Second Reading in the House of Commons
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Committee Stage
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Report Stage
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Third Reading in the House of Commons
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Same procedures in the House of Lords 
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Royal Assent  

Green paper: Consultation document on possible new law.
White paper: Governments firm proposals for new law.
First Reading: Formal introduction to the new bill into the house of Commons
Second Reading: Main debate on Bill's principle
Committee Stage: Clause by clause consideration of the Bill by a select committee
Report Stage: Committee reports suggested amendments back to the House of Commons
Third Reading: Final debate
Repeat of process in the House of Lords: All stages are repeated BUT if the House of Lords votes against the Bill, it can go back to the House of Commons and, under Parliament Acts 1911 and 1949, become law if the House of Commons passes it for the second time (rare occasion)

Royal Assent: A formality - normally Acts of Parliament come into force at midnight after receiving the Royal Assent.