The prime minister is to urge MPs to give her more time to secure changes to her Brexit deal.
Theresa May is expected to pledge in the Commons this week that MPs will get another say on Brexit if she cannot recommend a revised plan this month.
With 47 days until the UK is due to leave the European Union, some ministers have considered resigning so they could support backbench proposals to force the government to delay Brexit.
But Downing Street aims to reassure them by promising another vote where they can put forward alternative options, if a new deal has not been struck by 27 February.
Mrs May has been seeking legally binding changes to the plans for avoiding a hard border in Ireland.