Despite taking control of Penarth Town Council the previous year, the SDP-Liberal Alliance had a very disappointing result, failing to win a seat.
They had hoped to win seats in Barry, where Labour's Allan Maidment and Hector Gosling had defected to the Alliance.
[1] In the Llandough ward, the sitting Conservative Mayor of the Vale of Glamorgan, Susan Thomas, lost her seat, though by only three votes.
[3] (a) Elections Centre source also compares the percentage vote of the lead candidate for each party in the ward.
(b) South Wales Echo source also indicates existing councillors "but, because of boundary changes, not necessarily representing the ward being contested".