Food shortages , skyrocketing fuel prices, scarcities of some medications, days-long waits at the border. Those are the potential impacts of a no-deal Brexit as outlined by the British government in an internal policy paper.

Earlier this week, lawmakers forced the government to release the document, prepared as part of a contingency exercise called Operation Yellowhammer and dated Aug. 2. It details the “reasonable worst case planning assumptions” in case Britain crashes out of the European Union with no withdrawal agreement.

While much has been said by economists and business experts about the detrimental impact of a no-deal Brexit, Prime Minister Boris Johnson has minimized the damage, dismissing much of the speculation as “Operation Fear.” But the document makes clear that his own government is preparing to deal with the dangers the experts have been warning about. Here is what concerns them.