Sign up now for FREE unlimited access to Reuters.com Register LONDON, June 12 (Reuters) – Britain is set to violate international law by enacting legislation to unilaterally change Northern Ireland’s post-Brexit trade protocol, Ireland’s Sinn Féin party leader said on Sunday. Mary Lou McDonald said there were mechanisms in place to improve the implementation of the Dublin and Brussels protocol. “There is a willingness here, there is a willingness to commit to the European Commission, but the British government has refused to participate,” he told Sky News. “It was not constructive, it sought a catastrophic path and now it is proposing legislation that will undoubtedly violate international law.” Sign up now for FREE unlimited access to Reuters.com Register Report by Paul Sandle. Edited by: Catherine Evans Our role models: The Thomson Reuters Trust Principles.