By Lucy Caulkett-
Andrew Mountbatten has won a court battle over the illegality of search warrants used to search his property by THames Valley Pplice
The ruling exposes a serious weakness in Britain’s system for authorising police searches — and raises uncomfortable questions about how an experienced criminal court came to approve warrants that should never have been issued in that form.
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Andrew Mountbatten-Windsor has secured a significant legal victory after the High Court ruled that search warrants used by Thames Valley Police to raid two of his properties were unlawful.
The ruling concerns warrants issued at the Old Bailey on 18 February, shortly before Mountbatten-Windsor was arrested on suspicion of misconduct in public office. Police subsequently searched property connected to him at the Sandringham estate and his former home, Royal Lodge in Windsor.
The former Prince Andrew had challenged the legality of those searches. On Thursday, Mr Justice Nicholas Hilliard confirmed that an agreement had been reached between Mountbatten-Windsor and Thames Valley Police that the warrants were unlawful. The significance of the ruling lies not simply in the fact that the warrants have been quashed. It lies in why they were unlawful.
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Search warrants in England and Wales are governed by a complicated collection of statutory powers. The central legislation in this case is the Police and Criminal Evidence Act 1984, commonly known as PACE. The police application relied upon the wrong statutory route for the material they wanted to obtain.
The problem centred on the distinction between section 8 and section 9 of PACE. Section 8 provides a general mechanism for obtaining a warrant to search for evidence of an offence. But additional safeguards apply where the material being sought may include legally privileged or specially protected material.
Mr Justice Hilliard found that the judge who issued the warrants had proceeded on the basis that the material sought would not include legally privileged material or what is known as “special procedure material”. That assumption was critical.
Special procedure material can include confidential material acquired or created in the course of a person’s trade, business, profession or paid or unpaid public office. In Mountbatten-Windsor’s case, the allegation itself concerned his former public role as a UK trade representative and the alleged handling of confidential information.
The High Court therefore found that it could not properly have been concluded that such material was outside the scope of the search. The possibility of finding it was, in the judge’s words, expressly contemplated in the application and inherent in the nature of the allegation. That is the central legal failure, and where the case becomes more troubling — and more complicated.
It would be wrong to conclude that the Old Bailey judge simply ignored the law or knowingly authorised an illegal search. Search warrants are normally considered on the basis of an application made by investigators. The judge must decide whether the statutory conditions have been met on the information placed before the court. PACE itself requires the applicant to identify the legal basis of the application and specify the material being sought.
The difficulty in this case appears to have arisen from the interaction between the police’s application, the statutory classification of the material sought and the judge’s assessment of whether the requirements for the particular warrant had been satisfied.
The High Court ultimately concluded that the necessary condition could not properly have been satisfied because the application itself envisaged searches for material falling within the protected category.
In other words, the later High Court review identified a legal incompatibility that had not been resolved when the original warrant was issued. That does not necessarily mean the original judge had deliberately been misled. Nor does the present ruling establish that the judge knew the warrant was unlawful and issued it regardless.
It instead exposes a structural problem:, which is that the warrant system depends heavily upon the quality, precision and legal accuracy of the application presented to the issuing judge.
This is not the end of the criminal investigation
Mountbatten-Windsor’s victory does not amout to an acquittal or a declaration that the underlying criminal investigation is unlawful. Mr Justice Hilliard specifically emphasised that quashing the warrants does not bring the investigation to an end, and does not mean the entire investigation was unlawful. Police are also seeking to retain material seized during the searches.
That creates the next major legal battle. Thames Valley Police has applied for permission to retain the material on the basis that it may be capable of being lawfully seized under a different legal provision. Mountbatten-Windsor opposes that move. A further hearing is expected to address the issue.
An unlawful warrant does not automatically mean every piece of evidence obtained during the search becomes permanently unusable. The courts must consider what should happen to material already seized and whether it can lawfully be retained or used.
The case has attracted extraordinary attention because of Mountbatten-Windsor’s status and the allegations surrounding his links with Jeffrey Epstein. But the underlying issue is far wider.
Search warrants are among the most intrusive powers available to the state. They permit investigators to enter private premises, examine documents, seize electronic devices and obtain information that may be intensely personal or confidential. The Law Commission has previously warned that the system surrounding search warrants is vulnerable to error.
Its review found that about 40,000 search warrants are issued in England and Wales each year, while a 2016 National Crime Agency review of 268 operations found defective warrants in almost 79% of the investigations examined, about 8% contained potentially significant deficiencies.
The NCA review concerned defects in warrants within the operations it examined, and “defective” encompasses a range of problems. But the figures demonstrate something important: because mistakes in the warrant process are not an exotic phenomenon.
The Mountbatten-Windsor story appears to present an issue that extends beyond one former royal. When the legal safeguards surrounding state searches are sufficiently complex that police applications and judicial authorisations can diverge from the statutory requirements, the system must ask whether the process itself is adequately designed.
The issue is not whether police should be able to investigate serious allegations, but whether, when the state crosses the threshold of a person’s home and takes possession of their private property, the legal authority for doing so is beyond doubt before the door is opened — not months later, after the search has already happened. That is the real legal and ethical question now hanging over the case. And it is a question that cannot be answered simply by saying that the investigation continues.
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