• how to recognise genuine HMRC contact; https://www.gov.uk/government/publications/genuine-hmrc-contact-and-recognising-phishing-emails/genuine-hmrc-contact-and-recognising-phishing-emails
• how to avoid and report scams; https://www.gov.uk/report-suspicious-emails-websites-phishing
• examples of phishing emails and bogus HMRC contact. https://www.gov.uk/government/publications/phishing-and-bogus-emails-hm-revenue-and-customs-examples