evidence: Northern Ireland's major unionist parties will be part of a legal bid to challenge the NI Protocol. [...] DUP leader Arlene Foster said they were committed to challenging the NI Protocol "in the courts, in Parliament, in Stormont and in Brussels". She added that the judicial review proceedings will challenge the NI Protocol's "compatibility with the Act of Union 1800, the Northern Ireland Act of 1998 and the Belfast Agreement".