Deriving their legitimacy from the 'Brexit' vote which was won by the 'Leave' campaign, the Conservatives have pledged to remove Britain from the EU.
The government has begun Brexit negotiations, but the UK is not scheduled to leave the EU until March 2019 at the earliest. Theresa May reinstated this promise, and the March 2019 in particular at her 2017 Conference Speech.
Category: Brexit and Trade
Source: Manifesto - Page 7
Reference 1: Gov.UK Brexit Page
Reference 2: Theresa May Conference Speech