A British MP who wants out cannot hand in a letter of resignation. The rule dates to 1623, according to the Hansard Society, and it still governs how Commons seats fall vacant between general elections.
The workaround is a legal fiction. The MP applies to the Chancellor of the Exchequer for a ceremonial “office of profit under the Crown”, either the Chiltern Hundreds or the Manor of Northstead. Taking either one disqualifies the holder from sitting. The Chancellor issues the warrant, the seat empties, and a by-election follows.
Two offices, no duties
The Chiltern Hundreds covers parts of Buckinghamshire, including the Amersham, Beaconsfield and High Wycombe area. It was first used for resignation in 1751. Northstead is a smaller manor near Scalby in Yorkshire, put to the same use from 1844. Neither carries real duties or pay.
The reasoning goes back to the 17th century. Parliament worried that easy resignation would leave MPs open to royal pressure. A 1680 resolution then settled that accepting a Crown office costs an MP the seat. Attempts at reform have not got far; the Hansard Society notes that early proposals were rejected by Prime Ministers who feared MPs would resign more easily to stand elsewhere, and later calls for modernisation were also turned down.
From vacancy to polling day
Resignation is only one route. The Institute for Government lists others: death, bankruptcy, a peerage, a prison sentence of more than 12 months, or recall by constituents.
Whatever the cause, the next step happens on the floor of the Commons. By convention, the chief whip of the departing MP’s party “moves the writ”. If the House agrees, the Speaker issues a warrant to the clerk of the crown, a senior civil servant. The clerk sends the formal writ to the constituency’s returning officer.
Polling must then take place between 21 and 27 working days after the writ is issued. Tradition says the writ should go out within three months of the vacancy, though Parliament can hold it back when a general election is close.
While the seat sits empty, an MP from the same party in a nearby constituency usually deals with local matters.
Sources
- How By-Elections Are Triggered and Scheduled
- Why can MPs not simply resign their seats? Why must they apply for the Chiltern Hundreds?
