Kent County Council held its elections on 17 May 1989, as a part of the 1989 United Kingdom local elections, it was followed by the 1993 Kent County Council election.
Summary of 1989 results https://www.electionscentre.co.uk/wp-content/uploads/2015/07/Local-Elections-Handbook-1989-volume-1.pdf | 1989 Local Elections Handbook
References