With the NHS under such exceptional pressure during the coronavirus crisis, it’s easy to overlook the fact that the UK’s Brexit transition period ends on December 31. Mark Dayan takes a closer look at how these two challenges for the health service might collide, and says there is a case to err on the side of caution.

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.