The U.K. Supreme Court has ruled that Britain's Parliament must have a vote on triggering Article 50, which would start the two-year process for Britain's exit from the EU. The justices said that parliamentary approval would be needed first.

BT's (BT shares plummeted on news of larger-than-expected write-downs. The company also trimmed its profit guidance following an internal audit of its Italian unit.

European manufacturing has surged to its fastest pace since 2011, with European factories continuing to expand their output as employment hit a nine-year high.