David Cameron says nearly half of Welsh trade is with the European Union and the nation will be "better off" if the UK remains in.
Treasury officials have estimated that around 100,000 jobs in Wales could be linked to exports to EU countries.
The Prime Minister is visiting Wales in the latest campaign stop to persuade voters that Britain should remain part of the 28-member bloc.
My view is clear: we are better off, safer and stronger in the EU. Wales will be better off because businesses will continue to have full access to the free trade single market.
It is this market of 500 million consumers that brings jobs, investment and lower prices. The single market brings jobs because it's our trade with Europe that helps Welsh businesses to grow and take people on, especially in key industries like energy, aerospace, pharmaceuticals, and high-tech manufacturing
The Prime Minister has reasserted the rule that the security services cannot spy on MPs and confirmed that the same principle protects AMs and members of other devolved parliaments.
David Cameron's ruling follows a court case in July, when it emerged that GCHQ guidance had been revised and that AMs were no longer protected by the so-called 'Wilson Doctrine'.
It was named after the Labour Prime Minister Harold Wilson, who decided in 1966 that MPs could not be spied on. However, in a letter to the Assembly's Presiding Officer, Dame Rosemary Butler, Mr Cameron makes clear that he could give special permission in exceptional circumstances.
The Prime Minister will be consulted should there ever be a proposal to target any UK Parliamentarian ... This applies to Members of the House of Commons, ... the House of Lords, the Scottish Parliament, the Northern Ireland Assembly, the Welsh Assembly and UK Members of the European Parliament.
In a concession to the fact that policing is devolved in Scotland but not Wales, the Prime Minister adds that if the spying was to be carried out by Police Scotland, he wouldn't be consulted. It would be entirely up to the Scottish Government whether to over-ride the 'Wilson Doctrine'.
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Welsh Government sources say David Cameron has told Carwyn Jones that he expects the Queen's Speech to include a Wales Bill devolving further powers to the Welsh Government and Assembly.
The Prime Minister and First Minister had a "cordial" phone conversation, in which David Cameron seemed surprised by suggestions from opposition parties that the bill won't be included in the legislative programme read out by the Queen at the State Opening of Parliament.
The two men are said to have spoken about the work they need to do together to secure the future of the United Kingdom, as well as other devolution issues. Carwyn Jones will meet Welsh Secretary Stephen Crabb later this week for the first time since the election.
Major new powers for the Scottish Government and Parliament will be spelt out today. They're the result of the "vow" made by David Cameron, Ed Miliband and Nick Clegg in the final days of the Scottish independence referendum campaign, as they sought to save the UK at a time when polls were suggesting that Scots might vote to leave the union.
The three leaders committed their parties to enacting the new powers after the Westminster election but they also promised to publish the details of the legislation before Burns Night, on 25 January. Welsh First Minister Carwyn Jones has called for Wales to be offered the same powers and the UK Government is aiming to publish a cross party agreement before St David's Day on 1 March.
The Prime Minister will be in Scotland today and will meet the Scottish First Minister, Nicola Sturgeon. The SNP leader has already said that the cross-party agreement for Scotland on which the legislation will be based does not amount to Home Rule. She claims that's what Scots were promised if they voted against independence. Mr Cameron is expected to make a speech challenging her version of events.
"In September the people of Scotland came out in record numbers to decide the future of the United Kingdom. They voted clearly and decisively to keep our family of nations together. But a ‘no’ vote did not mean ‘no change’.
The leaders of the other main political parties and I promised extensive new powers for the Scottish Parliament – a vow – with a clear process and timetable.
We said we’d get cross-party agreement by St. Andrew’s Day – and we did. We said draft legislation would be published by Burns Night – and here we are, three days before the celebrations start, with those clauses before us."
The Prime Minister will claim that whoever forms the UK Government after May 7th, these new powers are guaranteed. He'll argue that the Scottish Parliament will determine how 60% of public money is spent in in Scotland and for the first time most of the money spent by the Scottish Government will come from taxes raised in Scotland. The package will include control of part of the welfare state, worth £2.5 billion.
David Cameron was shown the busiest section of railway in Wales, near Cardiff Central station, where the electrification of the Great Western main line and the Valleys lines will intersect.
The Prime Minister was shown round by Mark Langman of Network Rail Wales.
Prime Minister David Cameron, who's visiting the Royal Welsh Show at Llanelwedd, has announced plans for the UK Government to buy locally sourced seasonal food whenever possible. The Welsh Government already has a similar scheme.
In England, it's estimated that the public sector spends £1.2 billion a year on food, half of which is imported. The Prime Minister expects that most of the imported food could be replaced by British produce, much of it locally sourced.
No-one does more or works as hard in Wales and the rest of Britain today than our farmers. By opening up these contracts, we can help them create more jobs, invest in their businesses and make sure people in Wales have a healthier lifestyle. It’s a triple win –and will mean a brighter future for our country.
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