On the same day there were elections to the other district local authorities and community councils in Wales.
The Independents remained the largest group with a number of councillors elected unopposed.
[4] Both successful candidates had previously served as SDP councillors but did not join the Liberal Democrats.
Stanley Meredith Thomas had been elected at a by-election following the death of the previous member.
Thomas had stood as an Alliance candidate in 1987 Jones stood as a Liberal in 1987 The sitting Plaid Cymru councilor failed to submit a valid nomination.