ARTICLE AD BOX
By Nick Eardley
BBC political correspondent
A by-election in Nadine Dorries's seat of Mid-Bedfordshire will be held in mid-October.
The BBC understands the government will move the writ today, starting the formal by-election process after the sitting MP announced her intention to resign in June.
It is believed the vote could be held on either the 12 or 19 October. On 27 August, Ms Dorries, the former culture secretary, announced she would quit as MP, more than two months after pledging to go "with immediate effect".