Since the passing of the Fixed-term Parliaments Act 2011 for UK general elections, all four types of elections are held after fixed periods, though early elections to the UK parliament can occur in certain situations, with Senedd elections being postponed to avoid elections to the UK parliament and Senedd coinciding with each other.
Since the Fixed-term Parliaments Act 2011 for UK general elections, all four types of elections are held at fixed intervals; however, early elections to the UK parliament can occur under specific conditions, with Senedd elections being postponed to avoid simultaneous elections to both the UK Parliament and the Senedd.