What does invacuation mean?
Invacuation means bringing people inside, or moving them to a safer part of the building and away from the danger — the opposite of evacuation (getting people out). It is one of the four public protection procedures the standard tier of Martyn's Law asks for, alongside evacuation, lockdown and communication. At standard tier the duty is a workable plan only — where the safer area is, how you'd move and tell people, and who decides — with nothing to buy and no physical security measures required. The law is expected to commence in Spring 2027.
Invacuation means bringing people inside, or moving them to a safer part of the building and away from the danger — the opposite of evacuation, which is getting people out. It is sometimes called "inverse evacuation".
It's an unfamiliar word for a familiar idea. Most of us have practised getting out of a building — the fire drill. Invacuation is the same calm thinking, turned around: sometimes the safest thing is to stay in, or to move to a better spot indoors, because the danger is outside.
When you'd use invacuation
You'd invacuate when the danger is outside the building, or when leaving would put people in harm's way. The everyday example is an incident in the street or the car park: in that moment, walking everyone out of the front door is the last thing you'd want to do. Moving them away from the windows and doors, into a safer part of the building, is the sensible response.
The simple rule of thumb. If the danger is inside, you usually get people out (evacuation). If the danger is outside, you usually bring or keep people in, and away from it (invacuation). Your plan's job is to help whoever is in charge make that call quickly.
How it differs from evacuation
Evacuation and invacuation are partners, not rivals:
- Evacuation gets people out of the building and away from a danger inside it — the fire drill you already know.
- Invacuation brings people in, or moves them to a safer part of the building, because the danger is outside or because leaving would expose them to it.
The two sit side by side because the right answer depends on where the danger is. A good set of arrangements covers both, so that the person in charge isn't choosing in a vacuum — they're following a plan the venue agreed in advance.
One of the four standard-tier procedures
If your venue is in scope of Martyn's Law — that is, 200 or more people may reasonably be expected to be present at the same time — it falls into the standard tier. The standard tier asks for four public protection procedures:
- Evacuation — getting people out.
- Invacuation — moving people to a safer part of the building, away from the danger.
- Lockdown — securing the building to keep a danger out.
- Communication — telling people what's happening and what to do.
Invacuation is simply the second of these. None of the four asks for physical security measures or anything to buy — they are procedures, not products. We've broken all four down in our plain-English guide to the standard tier.
Planning invacuation for a community venue — at no cost
At standard tier, the duty is to have a procedure that works and that your people know — not to install anything. For a venue without a security team, an invacuation plan is short and practical. The "procedure" is really three honest answers:
- Where is the safer area? The part of your building furthest from the street and the main entrance, away from large windows — a back room, a hall with no external glass, an inner corridor. You almost certainly already have one in mind.
- How would you move and tell people? Who would walk the room and guide people calmly to the safer area, and how you'd let everyone know — a raised voice, a pre-agreed phrase, the PA if you have one. This is where invacuation meets the communication procedure.
- Who decides? Name the role, not just a person — "the duty manager", "whoever is running the event", "the warden on the day" — so the call gets made even when your usual person isn't there.
Write those three answers down, walk the route once with the people who run your events, and you have a workable invacuation procedure. It costs nothing and takes a morning. The government's guidance is free and is clear that you shouldn't need to buy anything to meet the duties.
How invacuation pairs with lockdown
Invacuation and lockdown often work as a sequence. First you invacuate — move people somewhere safer inside. Then, if it's the right response to the danger, you lock down — secure the doors so the danger can't follow them in. In practice that's "move people to the back room, then lock the front".
You don't need special equipment for either. Knowing which doors you'd secure, who holds the keys or knows the bolts, and how you'd keep people calm in the safer area is most of the work. Like the rest of the standard tier, it's the same steady planning you already apply to fire, asking "and what if the danger were a person rather than a fire?"
Not sure whether any of this applies to your venue yet? Start with the free scope checker, or read what the standard tier asks for in full in our guide to the four procedures.
Common questions
What does invacuation mean?
Invacuation means bringing people inside, or moving them to a safer part of the building or premises and away from the danger. It is the opposite of evacuation, which is getting people out. It is sometimes called inverse evacuation. You would use it when the danger is outside — for example an incident in the street or car park — and leaving would put people in harm's way.
What's the difference between invacuation and evacuation?
Evacuation gets people out of the building and away from a danger inside it, such as a fire. Invacuation does the reverse: it brings people in, or moves them to a safer part of the building, because the danger is outside or because leaving would expose them to it. The two are partners — your plan should help whoever is in charge decide quickly which one fits what is happening.
Is invacuation one of the four Martyn's Law procedures?
Yes. The standard tier asks for four public protection procedures: evacuation, invacuation, lockdown and communication. Invacuation is the one that covers moving people somewhere safer inside. At standard tier you need a workable plan for each — there are no physical security measures to install and nothing to buy.
Do we have to buy anything to plan invacuation?
No. At standard tier the duty is to have a procedure that works, not to install equipment. An invacuation plan is simply a written note of where your safer area is, how you would move and tell people, and who makes the call. The government's guidance is free and says you should not need to buy anything to meet the duties.
Three minutes, no sign-up: does the law apply to you?
Our free scope checker tells you whether Martyn's Law applies to your venue at all. And if you'd like one plain-English email a month between now and commencement, join the countdown list.