This is Money: Middle-class taxpayers are to be offered a partial amnesty if they settle their unpaid bills before October. Higher-rate taxpayers who have not yet completed their self-assessment forms will be given three months to declare any untaxed income they have earned before 2010.
Full story: http://www.thisismoney.co.uk/news/article-2168169/Middle-class-taxpayers-offered-partial-amnesty-undeclared-income.html