Liberal Democrats Gain a County Council Seat in Hertfordshire in a By-Election in the Three Rivers Rural Division
The Three Rivers Rural Division resulted from boundary changes and an additional county division that was added in 2017 in response to Hertfordshire's growing population. In the 2017 county council elections, which were overshadowed by Theresa May's snap election call, the Conservative who held the former Chorleywood Division won the new division but with a majority of only 153 votes.