The polls have closed in the Anglesey by-election and counting is under way.
Plaid Cymru have regained the seat of Ynys Mon in a by-election to the welsh assembly.
Votes have been cast since 07:00 BST, in the first by-election to be held for a Welsh assembly seat in seven years.
Former BBC Wales presenter Rhun ap Iorwerth secured a majority of over 42% or 9166 votes.
It was prompted when former Plaid Cymru leader Ieuan Wyn Jones stood down.
Labour managed to hold on to second place despite the efforts of UKIP who secured their best ever result to the assembly.
Results for the six candidates - Rhun ap Iorwerth (Plaid Cymru), Tal Michael (Labour), Conservative Neil Fairlamb, UKIP's Nathan Gill, Kathrine Jones (Socialist Labour) and Steve Churchman (Lib Dems) are expected overnight.
The Conservatives saw their vote collapse by 20%, with the Liberal Democrats beaten into last place by Socialist Labour.
A Labour victory would give First Minister Carwyn Jones an outright majority in the Senedd, while a poor performance would raise concerns about the party's prospects of retaining the parliamentary seat at the next general election.
The by-election was prompted when former Plaid Cymru leader Ieuan Wyn Jones stood down in June.
The candidates spent much of their time laying out where they stand on proposals to build a replacement nuclear power station at Wylfa.
Tal Michael - who contested the election for a north Wales police commissioner last year - also emphasised jobs during his campaign, saying he wanted to make Anglesey an "opportunity island".
Former BBC Wales presenter Rhun ap Iorwerth stressed the economy as his "number one priority", saying: "Too many young people leave Anglesey to find work and never return."
The Rector of Beaumaris, Rev Neil Fairlamb, wants "to prioritise education to develop skills relevant to our young people so they can get good jobs locally".
Nathan Gill called for a "job tax" of employers' national insurance to be removed or reduced to help small businesses develop, and said UKIP would "cut the waste in Cardiff Bay".
Liberal Democrat Steve Churchman wants a partnership between the Welsh government and county councils "to find the investment to build new properties".
Socialist Labour Party candidate, Kathrine Jones, said she would "oppose public subsidies going to private companies who take the money and then relocate".