In her speech Theresa May said this about a no-deal Brexit.
With no deal we would have: no implementation period, no security co-operation, no guarantees for UK citizens overseas, no certainty for businesses and workers here in Stoke and across the UK, and changes to everyday life in Northern Ireland that would put the future of our union at risk.
In his press statement, the DUP leader at Westminster, Nigel Dodds, said May should clarify what she meant. He explained:
The prime minister must explain this comment. What exactly would the government be changing? If this is nothing more than scaremongering, then the prime minister should cease from such foolish talk. Indeed, the Irish prime minister, Leo Varadkar, has said that the Republic of Ireland is not making preparations for a hard border even in the event of no deal being agreed.
Pretty strong words!