This paper examines the impact that the finally approved Artificial Intelligence Act (AIA) will have on European public authorities when developing, acquiring and using AI systems. It argues that, despite the initial disappointment that the Act may cause when approaching it from an administrative law perspective, and despite the fact that some of the solutions that have been finally chosen are questionable, it represents a remarkable step forward, duly addressing many of the problems raised in the literature in relation to the automation of administrative decisions and the use of AI systems by public authorities.

In this article I address the question of whether the omissions principle – the principle that the common law does not impose liability for omissions – applies with the same force in negligence cases involving public authority defendants as in cases involving private defendants. My argument is that the answer depends upon the answer to a prior question: can a duty of care be based upon the public law powers and duties of a public authority? In making my argument, I refute the views both of those who insist that a claim in negligence against a public authority can be rejected purely because it relates to an omission not falling within one of the standard exceptions to the omissions principle and of those who insist that such a claim can succeed while at the same denying that a duty of care can be based on a public authority's public law powers and duties.

The police do not owe a duty of care to protect victims from the criminal acts of a third party when investigating or suppressing crime save in exceptional circumstances. This is justified as an application of the omissions principle and on several other grounds. The article argues that most of these justifications are unconvincing and it sets outs a positive rationale for the imposition on the police of a duty of care in respect of sufficiently proximate victims of a negligent omission. The scope of this duty can be coherently delimited by re-adjusting the existing framework of negligence liability of public authorities.