accidental bodily injury or sudden and unexpected sickness of an Insured Person or Travelling Companion, which did not result from a
Pre-existing Condition and which prevents the Insured Person or Travelling Companion from starting the Trip. A Doctor must substantiate in writing that prior to the scheduled Trip departure date, he or she advised the Insured Person or Travelling Companion to cancel the Trip or that the accidental bodily injury or sickness made it impossible for the Insured Person or Travelling Companion to start the Trip;