Speaking at the opening of of the Scottish Conservative party's spring conference in Edinburgh, the prime minister is expected to say the referendum is "a major life decision" that shouldn't be made without knowing the full consequences.
He is expected to add:
And look at who's laying out those consequences: the governor of the Bank of England, the president of the European Commission, business chiefs from companies like BP and Shell; Alliance Trust and RBS; Lloyds, Barclays - the list goes on.
These are not political puppets, they are serious, non-partisan figures.
So, the idea that these are empty warnings and political scare-mongering is a myth - and we owe it to the people of Scotland to take that myth apart.
More top news
An internet troll who told a Jewish Labour MP she would "get it like Jo Cox" is facing jail for a second time.
Detectives investigating the attempted abduction of an RAF serviceman at Marham have released e-fit images of the suspects.
The National Trust has published a list of 50 things for children to do before they turn 11 and three-quarters, such as climbing a tree.