​​O&M Manual reviewed annually

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An O&M Manual represents the building and its installed services at handover.

As the building ages, however, equipment is replaced, settings change, systems are modified, contractors alter installations, software is updated and maintenance regimes evolve.

Unless these changes are incorporated, the manual gradually becomes a historic handover document rather than a reliable operational record.

This matters particularly where the information affects health and safety. Under CDM 2015, the Health and Safety File has specific continuing requirements: where relevant work is undertaken, information must be reviewed, updated and revised to reflect changes.

HSE guidance expressly refers to the file being reviewed, updated and revised from time to time.