evidence: The UK government has said it wants to remove the European Court of Justice from its oversight role as part of the Northern Ireland Protocol, saying as long as it continues the deal will never survive. [...] The Court of Justice of the European Union - to give it its full name - is the EU's highest legal authority. It is based in Luxembourg. [...] But that did not stop the government signing up to the NI Protocol, complete with ECJ oversight. It is that which Lord Frost wanted to change.