Hospitals are likely to experience delays to cancer testing and treatment regardless of the result of next week's Brexit vote, BBC Newsnight has learned.

Britain imports radioactive isotopes to detect and cure cancer. Border chaos at Dover would make them useless in the event of a no-deal Brexit.

The [Yellowhammer] documents themselves outline that there are risks to the supply of medicines - but do not set out the detail of how those risks have been mitigated, and what doctors and patients should do to plan for the possibility.

A no-deal Brexit will be grim for patients. Yet gagging orders are being used to keep the truth from coming out.