Manor of Northstead and the Chiltern Hundreds
The Steward and Bailiffs of the Chiltern Hundreds and of the Manor of Northstead were positions traditionally paid for by the Crown. In modern times they are unpaid, formal titles that are applied for when an MP needs to disqualify themselves from the Commons.
An elected MP has no right to resign: unless they die or are expelled they must become disqualified if they wish to retire before the end of a Parliament. By law, taking on one of these titles immediately bars a person from being an MP.