Ynys Mon by-election set for 1 August
The Ynys Mon assembly by-election will be held on 1 August, Presiding Officer Rosemary Butler has announced.
The poll for the Anglesey constituency was triggered by a decision by former deputy first minister and Plaid Cymru leader Ieuan Wyn Jones to stand down.
He revealed last week that he was leaving the Welsh assembly to lead the new Menai Science Park.
It is the first by-election to be held for an assembly seat for seven years.