He told BBC Radio 4"s Today programme: "It's not just because of the regulations which Northern Ireland would be subject to with the backstop, but also the fact we would have to treat the rest of the United Kingdom as a third country, we would not participate in any trade deals which the United Kingdom may enter into in the future and we would find that there would be a border down the Irish Sea, which would impede trade with our biggest trading partner, namely GB."
Watshela uhlelo lwe-Radio BBC 4 Today: "Akungenxa nje kuphela yeziqondiso iNyakatho Ireland ezoba ngaphansi kwazo, kodwa ngenxa yokuthi futhi kuzomelwe sibheke yonke i-United Kingdom njengezwe lesithathu, ngeke sibe neqhaza kunoma yiziphi izivumelwano zohwebo okungenzeka i-United Kingdom ingene kuzo esikhathini esizayo futhi sizothola ukuthi kunomngcele e-Irish Sea, ongaphazamisa uhwebo nozakwethu omkhulu kakhulu wohwebo, i-GB."