Report threads that break rules, are offensive, or contain fighting. Staff may not be aware of the forum abuse, and cannot do anything about it unless you tell us about it. click to
report forum abuse »
If one of the comments is offensive, please report the comment instead (there is a link in each comment to report it).
The Prime Minister said Article 50 of the Lisbon Treaty will be triggered in the first three months of 2017, marking the start of the two-year process to enact Brexit.
The process can be extended beyond two years if Britain and all other EU countries unanimously agree, but that prospect is seen as unlikely.
She made the announcement after revealing plans for a "Great Repeal Bill" to transpose all EU law applying to the UK into domestic law, ready for the day the country leaves the union.
Ahead of her speech on Brexit at the Conservative Party conference in Birmingham, Mrs May told BBC One's Andrew Marr Show: "As you know, I have been saying that we wouldn't trigger it before the end of this year so that we get some preparation in place.
"But yes, I will be saying in my speech today that we will trigger (Article 50) before the end of March next