Reacting to the Brexit speech, Sinn Fein MLA, John O'Dowd said: "Exiting the single European market, exiting the customs union, creates a hard border on the island of Ireland.
Warm words, soft words from Theresa May mean nothing.
"She has agreement with no-one in these islands in relation to how to move forward.
"She doesn't have agreement with the European Union on how to move forward.
"Her intentions to leave the Single European Market and her intentions to leave the customs union are going to have a detrimental impact on the economy in the north and across this island.
"It's clear today from Theresa May's Brexit statement that the views and opinions of the people of north have been completely ignored."