The Post Office Stand-Off

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Across
  1. 3. The permanent state of existence at any UK public counter.
  2. 4. The default word spoken when someone else steps on your foot.
  3. 5. A low-volume vocalisation of supreme moral outrage.
  4. 6. A sacred linear formation that defines British civilisation.
  5. 7. *A fragile item that arrives strictly on time and intact.
Down
  1. 1. A wooden barrier separating the hopeful from the indifferent.
  2. 2. Hiding murderous rage behind a weak, breathless smile.
  3. 4. *An affordable, highly efficient method of physical delivery.