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  1. CH160300 - Reasonable excuse: examples of reasonable excuse - GOV.UK

  2. Reasonable excuse: overview - HMRC internal manual - GOV.UK

  3. HMRC updates reasonable excuse guidance | AccountingWEB

  4. Reasonable Excuses: What Might Be and What Might Not? - 3PB …

  5. Chapter 12 Defences, mitigation and criminal responsibility

  6. Reasonable excuse for failure to notify | Tax Guidance | Tolley

  7. Grounds for appeal: Reasonable excuse (freeview)

  8. What is a reasonable excuse? - Anthony Gold

  9. Penalties for failure to notify a liability to tax—reasonable excuse

  10. Reasonable care and excuse | Tax Adviser