The Evidence (Special Measures) Act, 2012 - The Evidence (Special Measures) (Criminal Jurisdiction) (Judicature) (Supreme Court) Rules, 2016 - Application for main witness to give evidence by live link - Appropriate circumstances for use of special measure of live link - Definition of vulnerabe witness - Witness said to be in fear but no allegation of actual threat - Right of accused to a fair trial - Credibility significant issue - Risk of incurable prejudice of the accused - Overall interests of the administration of justice.