The noble Lord’s question as I understand it is whether the decision about public interest is one for the police or for the prosecutor because, in reality, that is where the decisions would lie. Ultimately, if both those bodies were satisfied and a prosecution were brought, the issue would be one for the court.
It is our position that a public interest defence is neither necessary nor appropriate. However, it is important to point out that, even if the Government were to accept the case that the offences risked criminalising such legitimate activity, a public interest defence would not be an appropriate way to address this issue. As crafted, the proposed defence puts the onus on the Government to prove “beyond reasonable doubt” that the defence did not apply. This defence would therefore act as an open invitation to those who seek to conduct espionage against the United Kingdom, and disproving this defence would likely require the disclosure of further sensitive material and only serve to compound the original harm.
The consequence of this is that those who intend to harm the United Kingdom will be able to exploit this defence to continue conducting harmful activities in the knowledge of the prosecution difficulties that would be faced by the authorities. This would limit the effectiveness of the legislation in enhancing our ability to deter and disrupt harmful activity.
Amendment 120B, proposed by the noble Lord, Lord Coaker, would require the Minister to publish an assessment of the potential merits of introducing a public interest defence. As I have just laid out, the Government have extensively considered the merits, or otherwise, of such a defence, and this renders a review after the Bill’s passage unnecessary, for the reasons I have already set out. Thus, for all these reasons, the Government cannot accept the tabled amendments.