Chancellor George Osborne has announced a new clampdown on tax evasion targeting offshore account holders.
He warned that anyone who fails to declare all of their income will have to pay the tax itself as well as penalties of up to twice that sum, and they could even face imprisonment.
Mr Osborne said: "We're throwing all the resources of the HMRC, our tax collectors, behind this. We'll be running adverts to give people fair warning that if they're hiding money offshore overseas that's not acceptable.
"We will find people - they have to pay their taxes and ultimately this is about fairness".
The new campaign will run in national newspapers and weekly magazines from tomorrow.
More top news
Jack Bruce, the composer, singer and multi-instrumentalist, died today of liver disease at the age of 71.
Police have confirmed that a father killed in a blaze at his home with his nine-year-old son died due to "the effects of the fire".
The first official photos from the set of the big-screen version of Second World War sitcom Dad's Army have been released.