In his speech to business leaders, David Cameron is expected to acknowledge that we're living in "perilous economic times".
"Turn on the TV news and you see the return of a crisis that never really went away: Greece on the brink…the survival of the Euro in question," he is expected to add.
"Faced with this, I have a clear task: to keep Britain safe.
"Not to take the easy course - but the right course."
More top news
Duke of York and George Osborne were among the 1,000 guests at a moving commemoration service at Manchester Cathedral
Police are appealing for information after an armed robbery at a bookmakers in Ashton.
The extraordinary sight of 'ghost soldiers' wandering through streets and train stations has provoked a huge reaction