Non VAT Sole Trader Invoice - Date Of Supply

Hi, I know that one of HMRC requirements is to include Date Of Supply on the invoice. Is it actually required? If I do not provide one on the invoice is it assumed that Invoice Date is also a Date Of Supply? Should I always put Date Of Supply on the invoice to avoid issues?

Hi
If this is a requirement, then yes as it could affect the year in which the income is received if using traditional accounting.