Key steps on BritainÕs road to Brexit Prime Minister Theresa MayÕs government is seeking approval for legislation giving her the right to start BritainÕs divorce from the EU ÑÑÑÑÑÑ Jan 24: Supreme Court rules government must seek parliamentary approval to invoke Article 50 of Lisbon Treaty Ð formal process for leaving European Union Feb 1: Members of House of Commons vote by 498 to 114 to advance bill giving Theresa May power to trigger Article 50 Feb 6-8: Bill faces further scrutiny in Commons Feb 20-Mar 7: Bill sent to House of Lords. Amendments debated between both houses in Òping-pongÓ process before final bill is agreed. Bill sent to Queen for royal assent to become law Mar 9-10: May could use EU summit in Brussels to formally trigger Article 50 and start two-year countdown Mar 31: Deadline May has set for invoking Article 50 May 2019: Britain could formally leave EU, following ratification of Brexit by all other 27 member states Sep 30, 2018: Date by which EUÕs chief Brexit negotiator, Michel Barnier, wants to wrap up terms of BritainÕs exit ÑÑÑÑÑÑ Pictures: Associated Press © GRAPHIC NEWS