England and New Zealand dispute over Brad Shields may end up in court

• New Zealand have threatened to block England picking Shields• Eddie Jones may select player for summer tour of South AfricaEngland and New Zealand will be on a collision course that may end in the courtroom should Eddie Jones seek to select Brad Shields for the summer tour of South Africa in a dispute that is set to threaten World Rugby’s authority as arbiters of the global game.New Zealand have threatened to block England from picking Shields for three-Test series against the Springboks – and have claimed they have legal basis for doing so – after it was first revealed by the Guardian that …