What the National File Standard Requires
The National File Standard is not merely a procedural checklist. It reflects the principle that a charging decision should be made on a complete and balanced picture. The file must cover information relating to the suspect — including mental health considerations, language requirements, arrest circumstances, and bail status. It must cover information relating to the offence — including a factual summary, proposed charges, applicable time limits, and the officer's understanding of the defence case. And it must cover the investigation itself — all reasonable lines of enquiry pursued, including those that assist the defence, with a justification for any lines not followed.
Digital and Forensic Material
The NFS places specific obligations on investigators in relation to digital evidence. Where mobile devices or digital accounts have been examined, the police must disclose why the examination was considered reasonable and proportionate, the keyword parameters, date ranges, and search criteria applied, and — if a device was returned without examination — the justification for that decision. Where significant evidence such as DNA results, medical reports, or audio-visual footage is outstanding at the time of referral, the police must provide a target date for when it will be available.
Why the NFS Matters to Your Defence
Effective pre-charge defence work involves understanding exactly what material the police are required to provide, and identifying where they have fallen short. Any explanation offered during interview, or raised through pre-charge engagement, must be considered and addressed in the file — it cannot be ignored. Where a file does not adequately address the defence case, representations can be made before the CPS reaches its decision. A file that does not meet the NFS may result in the CPS declining to charge, or in the charging decision being delayed until the gaps are addressed.
Using the NFS as a Defensive Tool
The National File Standard can be used proactively to monitor the progress of an investigation and to identify gaps in the material the police intend to rely on. Where the file does not adequately address lines of enquiry pointing away from the suspect, or where outstanding forensic material has not been accounted for, representations can be made before the CPS reaches its decision. In either case, early identification of those gaps by a defence solicitor can make a material difference to the outcome.