Delegated legislation is a form of secondary legislation made by other bodies outside of parliament as parliament only manage to pass a limited number of acts per year so it permits other bodies to make law on its behalf as all acts have enabling facility which allows a certain body to make law in the future, acts contain the framework and the detail is left to be made by delegated legislation
When parliament are on recess and law is needed urgently the privy council can make law quickly in form of orders in council. Sometimes a specific expertise is needed in certain areas of law so relevant government ministers are able to make law in form of statutory instruments as they have the relevant technical knowledge. Local authorities can also make law when needed in certain geographical areas in form of by laws as all law does not have to be made nationally.
