I will come back to the hon. and learned Lady in a moment.
The Home Office is affected by this deal in two significant areas: security and immigration. Today I will set out what is on offer in these two important areas and why the deal is in the interests of the United Kingdom. Let me start with security. The Brexit deal negotiated by the Prime Minister delivers the solid foundation that we need for future security co-operation with our European partners. It avoids a cliff edge by providing for an implementation period, ensuring a smooth transition from current arrangements to a new, strong partnership.
An unplanned no deal Brexit would mean an immediate and probably indefinite loss of some security capability, which, despite our best efforts, would likely cause some operational disruption when we leave. As Home Secretary, I know which option I would prefer. I have seen at first hand how important it is to have a strong security partnership with our European allies. I have seen the potential dangers that such co-operation prevents, and the security and safety that it ensures.