David Cameron will tell the leaders of Scotland, Wales and Northern Ireland that it is time to concentrate on best using the powers they have rather than debating what more could be devolved.

Scotland’s former first minister, Alex Salmond, has launched his bid to win a seat at Westminster in next year’s general election.

The power to set corporation tax rates in Northern Ireland will be devolved to the power-sharing Executive if the North's politicians can reach agreement in an ongoing all-party talks initiative, the chancellor has announced.

British Chancellor George Osborne is today expected to indicate whether the power to set business tax rates will be devolved to the Northern Ireland Assembly.