The by-election followed the death of Peter Law
| Dai Davis | Independent | 12,543 | 46.17% |
| Owen Smith | Labour | 10,059 | 37.03% |
| Steffan Lewis | Plaid Cymru | 1,755 | 6.46% |
| Amy Kitcher | Liberal Democrat | 1,477 | 5.44% |
| Margrit Williams | Conservative | 1,013 | 3.73% |
| Alan Hope | Official Monster Raving Loony Party | 318 | 1.17% |
Electorate: 52,512; Total vote: 27,165; Turnout: 51.73%;
Majority: 2,484 (9.14%)
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Last Modified: 13 Feb 10