A protestor from the 'Robin Hood Tax Campaign,' dressed as 'Robin Hood,' holds a fake budget box above the Houses of Parliament, in London, on March 23, 2010, to urge British Finance Minister Alistair Darling to introduce a tax on banks' financial transactions. Alistair Darling will announce what could be his final annual budget on Wednesday, with opinion polls showing the opposition Conservatives could achieve a narrow victory in the vote expected on May 6. AFP PHOTO/WARREN ALLOTT (Photo credit should read Warren Allott/AFP via Getty Images)
