Only parliament can trigger Brexit. But can it then reverse the process? | Geoffrey Robertson

The supreme court judges left a large question mark over whether article 50 would mark a definitive exit from Europe or whether it could be repealedThe supreme court decision was predictable, but momentous nonetheless – a reaffirmation of the result of the Civil War, namely that parliamentary sovereignty trumps executive power, whether the executive is the king or Theresa May and her cabinet. Article 50 cannot be accessed other than by a statute passed by parliament, which repeals the 1972