Since an in/out referendum was proposed in 2013, leaving the EU has become a tough and endless issue for Britain as well as for the European bloc. Several ministers, even the then-prime minister, have resigned and different versions of Brexit plans, including a "Meaningful vote two," have been conducted over the six years. As for Theresa May, who leads the Brexit and has survived votes of no confidence, she is trying to realize her promise – "Brexit means Brexit." 

Here is a quick look at the Brexit timeline.