This remains , as of 2016 , the most recent by-election resulting from the assassination of a sitting MP that was contested by all of the major parties . Following the next such killing , which occurred in 2016 when Labour MP Jo Cox was attacked and murdered in her constituency , Labour 's major political rivals announced they would not contest the ensuing Batley and Spen by-election
was attacked and murdered
Murder of Jo Cox
1990 Eastbourne by-election