Conservative candidate Paul Darrington beat Labour into second place by 12 votes In a closely fought by-election in Swanley White Oak.
The results were: Conservatives 319, Lab 307 and Lib Dem 230.
The result follows on from a previous by-election in the ward in October 2016, which was also won by the Conservatives, when Cllr Michael Horwood beat the Liberal Democrats candidate by one vote.