Jeremy Hunt will tell MPs he is planning to ramp up preparations for a no-deal Brexit which will include a £6bn war chest for farmers and fishermen exporting to Europe.
The Tory leadership candidate will set out a 10-point plan, including a Cobra-style committee to "turbocharge" Whitehall preparations and keep Britain open for business in the event of World Trade Organisation (WTO) tariffs coming into effect.
"You cannot leave the European Union on a wing and a prayer," he is expected to say. "Britain deserves better."
Watch Jeremy Hunt being questioned by Kay Burley in 'Battle for Number 10' - a special programme on Sky News at 7pm tonight.
"If you're a sheep farmer in Shropshire or a fisherman in Peterhead I have a simple message for you - I know you face uncertainty if we have to leave the EU without a deal," he will add.
"I will mitigate the impact of no-deal Brexit on you and step in to help smooth those short-term difficulties.
"If we could do it for the bankers in the financial crisis, we can do it for our fishermen, farmers and small businesses now."