| Feature | Select Committees | Public Bill Committees |
|---|---|---|
| Purpose | Ongoing oversight of a department | Scrutiny of a specific piece of legislation |
| Duration | Permanent for the duration of Parliament | Temporary; disbanded after the bill is reviewed |
| Composition | Reflects party balance; often independent-minded | Heavily whipped; usually follows government line |
| Power | Can call external witnesses and experts | Limited mostly to debating the text of the bill |