Health chiefs are appealing to children still unprotected against measles to sign up to an in-school vaccination drive before it ends.

US president Barack Obama has spoken of his "gratitude" to rescuers who raced to help some of the thousands of people caught up in a deadly storm he described as "one of the most destructive tornadoes in history".

Embattled NHS boss Sir David Nicholson plans to retire next year.

The chief executive of the NHS, Sir David Nicholson, has announced he will retire next year.