Quick Answer
Keep gun cabinet keys under your personal control or in secure storage that prevents unauthorised access. Protect spare keys just as carefully as your everyday set. Never leave keys in the cabinet lock, hanging nearby or somewhere another person could readily find them.
Your arrangements should prevent anyone without lawful authority from gaining access to your firearms or ammunition. If you are unsure whether your setup is suitable, discuss it with your police firearms licensing department.
What guidance applies?
This answer focuses on Great Britain. The Home Office Firearms Security Handbook, paragraphs 2.3 and 2.58, explains key access control and recommends keeping primary and spare keys separately. The handbook is guidance, not a statement of law; comply with your certificate conditions and discuss your circumstances with your licensing department. Northern Ireland has a separate licensing framework: seek advice from PSNI rather than assuming the Great Britain arrangements apply.
Focus on access, not just concealment
A concealed key is not necessarily a secure key. Drawers, bedside tables, kitchen hooks and containers near the cabinet are predictable places to look. A hiding place also becomes ineffective once someone has seen you use it.
Ask yourself whether a child, visitor, tradesperson or household member could obtain the key and open the cabinet. Consider what happens when you are asleep, away from home or distracted, not only when you are standing beside it.
For more detail, see where UK shooters should keep gun cabinet keys.
Choose a controlled storage arrangement
Carrying keys on your person can provide effective control, provided you keep them secure and do not leave them in unattended coats, bags or vehicles. Avoid labels or key tags that identify the cabinet or your firearms storage address.
If you use a separate key safe, choose a suitably robust product and installation. Its location, fixing, resistance to attack and access controls all matter. A basic household key box should not automatically be treated as adequate firearms security.
Keep any code confidential and avoid predictable combinations. Do not store a code beside the safe or share it casually with family members. Anyone who can retrieve the keys may effectively gain access to the cabinet.
There is no single arrangement that suits every property. Check any specific requirements or concerns raised by your firearms enquiry officer rather than assuming a particular product guarantees compliance.
Protect spare keys equally
A spare key can defeat otherwise sound security if it is kept under a plant pot, in an unlocked drawer or with someone who is not lawfully entitled to access the cabinet contents.
Store primary and spare keys separately, as recommended in paragraph 2.58 of the handbook. Maintain a clear account of how many keys exist and who controls them. Do not make extra copies simply for convenience. If you propose keeping a spare elsewhere, check that the arrangement preserves security and does not enable unauthorised possession or access.
Emergency planning should not mean giving unrestricted access to a partner, relative or neighbour. Household members can know whom to contact without knowing where keys are stored or how to open the cabinet. Read the guide to spare cabinet keys and emergency access when planning these arrangements.
Build secure everyday habits
Use a consistent routine whenever you open the cabinet:
- Keep the keys with you while the cabinet is open.
- Check that the door is properly closed and locked afterwards.
- Remove the keys immediately and return them to controlled storage.
- Check that your spare keys remain accounted for.
- Avoid discussing key locations or codes where others can overhear.
Review these habits when children become more independent, household members change or contractors need access to your home. The guide to reviewing gun cabinet key security provides a useful starting point.
Respond promptly to missing or compromised keys
If a key disappears, do not assume it will turn up. Consider whether someone could identify the cabinet and use it. Take immediate steps to prevent unauthorised access and contact your police firearms licensing department promptly for advice. Report suspected theft to the police, and call 999 if there is an immediate danger.
A replacement key alone does not remove the risk from a missing original. Lock replacement or another secure arrangement may be necessary. Keep a brief security review record, but avoid recording exact hiding places, codes or other access secrets in general notes or shooting logs.
Practical Bottom Line
Control every cabinet key, protect spares to the same standard and review access whenever circumstances change. Security depends on preventing unauthorised access, not simply putting keys out of sight.