The timing of the decision took lawmakers by surprise. One called the move "sinister."
Great Britain is without a plan just 17 days before the country's proposed exit from the European Union.
The narrow victory comes a day after her European Union divorce deal was rejected.
The Brexit process is supposed to begin in March.
Yesterday Bob Diamond resigned as CEO of Barclays Bank, and this hour he's sitting before a Parliamentary committee in London. Parliament is investigating the possible manipulation of interest rates by Barclays and other banks.