Why was there a by-election?published at 11:38 Greenwich Mean Time 17 December 2021
Let's look back at why there was a by-election in the first place. Owen Paterson had held the North Shropshire seat since 1997 for the Conservatives.
Under David Cameron, Paterson held a number of positions in government including Northern Ireland secretary and environment secretary, before he returned to the back benches in 2014.
After leaving government he became a paid consultant for Randox Laboratories and Lynn's Country Foods who paid him thousands of pounds a month.
When he was found to have lobbied on behalf of these companies, the Commissioner for Parliamentary Standards recommended he be suspended as an MP for 30 days for breaking lobbying rules.
He would deny any rules were broken but eventually resigned from his position in November, after the government was accused of "cronyism" for its efforts to block his suspension.
Boris Johnson said he could have handled the affair "better" - and then admitted to MPs he "crashed the car" .