The Scottish legal system and that in England & Wales have their basis in two different legal traditions with that in Scotland based upon Roman Law and Common Law in England & Wales. Unification of the legal systems of Scotland and England & Wales was excluded when the Union of two Parliaments was agreed in 1706. Since then both systems have developed and have remained independent in particular through different court system and the unique role of the Procurator Fiscal in Scotland. For Northern Ireland there are more similarities since both are Common Law basis however differences still exist and particularly in the way court cases are handled. This difference also extends to both the method of recording statistical information on the criminal justice system and the range of information collected.