Pro-Remain MPs are considering using their Commons majority to keep Britain inside the EU single market if there is a vote for Brexit, the BBC has learned.
The MPs fear a post-Brexit government might negotiate a limited free trade deal with the EU, which they say would damage the UK’s economy.
There is a pro-Remain majority in the House of Commons of 454 MPs to 147.
A Vote Leave campaign spokesman said MPs will not be able to “defy the will of the electorate” on key issues.
The single market guarantees the free movement of goods, people, services and capital.
The BBC has learned pro-Remain MPs would use their voting power in the House of Commons to protect what they see as the economic benefits of a single market, which gives the UK access to 500 million consumers.
Staying inside the single market would mean Britain would have to keep its borders open to EU workers and continue paying into EU coffers.