Businesses having tax problems due to flooding can contact HMRC’s helpline: 0800 904 7900. This is open on weekdays from 8am to 8pm and until 4pm every Saturday.

Should your problem be specifically about payment problems, call 0300 200 3835 (if the payment is not yet due) or 0300 200 3822 for self-assessment payments that are overdue. Agents can call the debt management agent dedicated line on 0300 200 3887. A self-assessment payment plan can also now be set up online if certain conditions are met.