Bing found these results
CH160300 - Reasonable excuse: examples of reasonable excuse - GOV.UK
Reasonable excuse: overview - HMRC internal manual - GOV.UK
HMRC updates reasonable excuse guidance | AccountingWEB
Reasonable Excuses: What Might Be and What Might Not? - 3PB …
Chapter 12 Defences, mitigation and criminal responsibility
Reasonable excuse for failure to notify | Tax Guidance | Tolley
Grounds for appeal: Reasonable excuse (freeview)
What is a reasonable excuse? - Anthony Gold
Penalties for failure to notify a liability to tax—reasonable excuse
Reasonable care and excuse | Tax Adviser