The Tory MP James Wharton has introduced a private members' bill calling for a referendum on Britain's membership of the EU to be held no later than the end of 2017.
- Private members' bill have a lower success rate than bills with government backing
- Very little parliamentary time devoted to such bills
- Its opponents are likely to try "talk out" the bill by using up the time devoted to it
- Most bills that do pass have cross-party support. Most Labour and Lib Dem MPs are opposed.
- It still has three more stages before passing the Commons and a further five in the Lords
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