Isolation, switching, and a climb before it is done.

Three areas, and the same job ticket.

Falls from height, hazardous substances and fire, machinery and tools. Your risk assessment lists them separately. On one job they turn up between the isolation and the hand-back.

• The climb is routine. The thing the harness is clipped to is not.

  A mast, a roof with plant on it, a ladder against a transformer bay. Somebody has done this a hundred times and moves the lanyard once without a second point, because the next step is right there and the weather is turning.

  Hazard area: Falls from height. Anyone who has never fallen underrates the anchor.

• A battery room, an oil-filled unit, and a hot works permit.

  Something smells wrong in a room nobody has opened since the last inspection. Whoever is standing there has to know what it is and what to do about it before anybody can look it up.

  Hazard area: Hazardous substances and fire. Recognising beats looking it up.

• A drum under tension, a winch running, a hand on the cable.

  Pulling cable, cutting in a joint, a panel door that swings on its own weight. The equipment is doing exactly what it was built to do, and there is no time to think about where the load will go when something lets go.

  Hazard area: Machinery and tools. What counts is the reaction in that second, not the knowledge in your head.

None of this needs an outage.

A run takes minutes and happens at your own depot. It fits into the gaps a working day already has, and it can be done again as often as a crew needs.

It fits into the morning, before the vans leave the depot.

Two or three people at a time, at the briefing, on a standby day, in the hour between two jobs. The situation runs for them and ends when they are done. Nothing is switched, isolated or taken out of service for it, and no window has to be booked.

That is what makes repeating it possible. The same situation can be run again before the next shutdown and again a year later, as often as somebody needs it, and it costs the day the same few minutes every time.

Whoever is on the crew this week.

New starters, a contractor crew brought in for a shutdown, people moved across from another region who do not know this installation. They go through the same run as the permanent crew, in the week they arrive.

Every run is written down.

Who took part, on what, and when — by crew and by depot, ready to export into the records you keep anyway. Participation, nothing about how a single person did.