By-Election Location
By winning party colour
Voting Breakdown
Percentage based
Gains and Losses
Percentage based
Plaid Cymru 747 [65.2%; +15.7%]
Lab 239 [20.9%; -15.0%]
Con 146 [12.7%; -1.9%]
LD Caryl Tandy 14 [1.2%; +1.2%]
Plaid Cymru hold
Turnout 35.1%
Percentage changes from 2017