THE First Minister of Wales, Carwyn Jones, has said proposals to give each of the four home nations a veto over the UK leaving the EU are "worth considering".

First Minister Nicola Sturgeon last week insisted any vote to leave the EU should have a majority in Scotland, England, Wales and Northern Ireland for it to be legitimate.

Speaking at First Minister's Questions at the Welsh Assembly in Cardiff, Mr Jones agreed the UK should not leave the Brussels bloc solely on the basis of votes in England.

He said: "I don't think the UK will leave the EU.

"I think given the opinion polling we've seen recently it's unlikely; when people are unsure about something they tend to stick to the status quo."

But the Labour First Minister added: "If the UK leaves the EU on the basis of English votes it would trigger a constitutional crisis the likes of which we have not seen."

Prime Minister David Cameron has promised an in/out referendum on Britain's EU membership in 2017 if the Conservatives win a majority in May's general election.

Last week he rejected Ms Sturgeon's call and said any future referendum would be decided by a UK-wide majority.

SNP MSP Clare Adamson said: "It is absolutely vital that all four UK nations can make their voice heard on this issue.

"Labour's First Minister in Wales has said that the 'double majority' idea being proposed by the SNP - requiring all four UK nations to vote for a European exit - is 'worth considering'.

"Labour in Scotland should show the same constructive attitude."

Recent polls have suggested Scots would vote to remain in the EU while the English would vote to leave.

Ms Sturgeon proposed amending any future EU Referendum Bill to ensure a majority would have to vote in favour of withdrawal in each of the four UK nations for the result to be valid.

Ms Adamson added: "The No parties told the people of Scotland throughout the referendum campaign that EU membership was not at risk as part of the UK 'family of nations'. This was clearly untrue.

"They must now stop this Ukip-driven lurch to the right and do what is best for all corners of the UK - instead of only looking out for the interests of a few desperate Westminster politicians.

"While the EU isn't perfect, the interests of Scotland are best served by being part of the EU. It is clear that the Welsh government feels the same way."

Ms Sturgeon's move was seen as an attempt to pave the way for a second independence referendum in the event of a vote to leave the EU.

The First Minister-in-waiting has refused to say whether the SNP will hold a fresh independence vote if they win a Holyrood majority in 2016.