Some officials at the European Union summit in Brussels expressed relief as exit polls arrived from across the Channel, predicting a workable parliamentary majority for the pro-Brexit premier.
"I don't pretend everybody who voted SNP yesterday will necessarily support independence, but there is a clear endorsement Scotland should get to decide our future and not have it decided for us", she said.
"The people of North Down do want to remain, the people of Northern Ireland do want to remain, that is the resounding message of the election but what we need to do now is have the reality check", she said.More news: UK Conservative Party projected to win majority
Alliance leader Naomi Long said: "If Boris Johnson chooses to use his mandate to pursue a no-deal or a hard Brexit then it is inevitable that Scotland will push for a second referendum on independence and it is nearly inevitable that there will be a push for an Irish unity referendum".
The EU leaders have a Brexit text ready to adopt on Friday at the end of their two day summit. He emphatically does not have a mandate to take Scotland out of the European Union.
While Barnier will direct trade negotiations, the leaders will follow closely "and provide further guidance as necessary fully consistent with the EU's best interest and with the aim of reaching a result that is fair and equitable for all Member States and in the interest of our citizens".
Taoiseach Leo Varadkar has congratulated Boris Johnson and welcomed his outright majority after Thursday's election.More news: Barnard stabs suspect without bail after Tessa Major's murder
Long told BBC Radio Ulster's the Nolan Show that the prime minister wanted to deliver more than Brexit.
"Obviously, it's entirely a decision for the people of the United Kingdom to elect whatever government they want and I just hope the result is decisive so that we know where we're going over the next few months".
The Taoiseach said Ireland would be pushing for a new PEACE fund for Northern Ireland worth €1bn in the European Union budget negotiations for the next seven-year cycle.
They also discussed how to strengthen the bilateral ties between Ireland and Britain, he said, adding that both looked forward to the smooth passage of the Withdrawal Agreement and agreed to stay in close contact in the period ahead.More news: Star Wars' John Boyega Apologizes For ''Badly Worded'' Comments
And he called for "a parliament in London that agrees on the future relationship, and all these things very quickly".