David Cameron has warned that leaving the European Union “could hurt working person for years to come” as he set the case for staying in the EU to MPs.
He said the choice was between an “even greater Britain” by staying in, or a “leap into the dark” by exiting.
There were thinly veiled swipes at Boris Johnson, including the PM ruling out the idea of a second referendum.
More than 100 Conservative MPs want to leave the EU, including some ministers sat alongside the PM in the Commons.
Follow the latest updates with the BBC's EU Referendum Live The UK's EU vote: All you need to know Remain v Leave: Where Conservatives stand Paper review: Johnson predominates front pages Media captionThe defence secretary explains why he wants to stay in the EU Media captionBoris Johnson: “I want a better bargain for the people of this country” Media captionStanley Johnson says his son Boris' campaign to leave the EU is not a careerist move Media captionDavid Cameron: “You have an illusion of sovereignty but you don't have power”