List of by-elections to the Senedd
This is a list of by-elections to the Senedd (Welsh Parliament; ; formerly known as the National Assembly for Wales). Where seats changed political party at the by-election, the result is highlighted. *Peter Law left the Labour Party and sat as an independent prior to his death. The by-election was won by his widow, but is classed as an independent gain from Labour. See also
 List of by-elections to the Scottish Parliament
 Regional member changes to the Senedd

References

Welsh Assembly by-elections
Lists of by-elections in the United Kingdom

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