We have a two-tier committee system, so that may be misleading. We have our select committees, which look into subjects of their own choice, the so-called scrutiny committees that have chairs elected by the chamber. That's a different issue. They are not involved.
These are the committees that are smaller versions of the chamber, of maybe 17 or 20 members who look at legislation in detail on the committee stage off the floor, or look at delegated legislation, statutory instruments and so on. They are chaired in a neutral manner from a panel of about 35 members who are nominated by the Speaker on a party balance. They are senior members who are paid extra. They chair public bill committees and general committees, but they also chair Westminster Hall.