Article 50 'could be triggered on Tuesday' if Brexit bill passes

Theresa May could trigger article 50, the formal process for leaving the European Union, as early as Tuesday if the Brexit bill passes late on Monday, government sources say.The legislation, which passed through the House of Commons unamended, is due to be debated by MPs on Monday.Rebel Conservative MPs have urged the Brexit secretary, David Davis, to give firm promises on both issues when he addresses the Commons.