The few opinion polls that have been conducted in Wales suggest that Labour will be the largest party in the Welsh Assembly - and that the real question is whether it will win an overall majority.

The party consistently polled above 50% of the vote, occasionally touching 60%, in the early stages of the campaign.

The most recent poll puts Labour under that level, but with just enough strength to win outright.

Plaid Cymru is showing in second place in the polls. Most of its strength is in the north of the country.

The Conservatives are generally shown as being ahead of the Liberal Democrats in terms of popular support, but the latter sometimes do better in the regional top-up votes.

Opinion polls have a margin of error of +/- 3%.