Top taxman Dave Hartnett has made his debut on YouTube, urging UK citizens with offshore accounts to take one last chance to declare their assets.

"Here's a blunt message from Revenue & Customs. Times have changed, the taxman now has more powers, and more information. If you're a UK based investor and have offshore accounts or assets, you must declare them. If you evade tax on your offshore assets you'll be found out and could be prosecuted," said Hartnett on YouTube.

Hartnett, permanent secretary for tax at HM Revenue & Customs, is no stranger to the spotlight. He has appeared in front of the Treasury Select committee, records podcasts on HMRC's website and has been interviewed on Accountancy Age TV on several occasions.

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