evidence: Brexit: Unionist leaders unite in NI Protocol opposition - Published - comments The leaders of Northern Ireland's four main unionist parties have signed a joint declaration affirming their opposition to the Northern Ireland Protocol. [...] The declaration states: "We, the undersigned unionist political leaders, affirm our opposition to the Northern Ireland Protocol, its mechanisms and structures and reaffirm our unalterable position that the protocol must be rejected and replaced by arrangements which fully respect Northern Ireland's position as a constituent and integral part of the United Kingdom."