My Lords, I will be exceedingly brief. My noble friend Lord Purvis of Tweed has made the case and I am not able to better it. I just want to raise an underlying principle. I suspect that every Member of this House is very cautious of any power that enables the Government by regulation to change primary legislation of any kind. Where it is necessary to provide that power, there should generally be a principle that the time period is as short as possible and that power is as limited as possible. Otherwise, we begin to compromise the whole concept of primary legislation and the purpose and meaning of parliamentary legislation.
Three years is surely a perfectly adequate time to be able to make any implementing changes necessary as continuity agreements are negotiated and signed. The underlying principle is one that the House needs to pay attention to. Setting precedents allowing an entire Parliament to pass during which period powers are given to a Government to override primary legislation through regulation, even if it is in a constrained environment, is a principle that we must absolutely challenge.