Factbox - Timeline for Britain's Brexit legislation

Prime Minister Theresa May is seeking parliament's approval to trigger the legal process for leaving the European Union. TIMELINE Jan. 26 - The government published the 'European Union (Notification of Withdrawal) Bill' Feb. 1 - The bill passes the first legislative test, winning a vote in parliament on the broad principles of the law by 498 votes to 114. This debate is due to last four hours, starting at approximately 1700 GMT.