A UK group of climate activists is planning to fly drones close to Heathrow Airport next month in a direct action they hope will shut down the country’s largest airport for days or even longer.

The planned action is in protest at the government’s decision to green-light a third runway at Heathrow.

They plan to use small, lightweight “toy” drones, flown at head high (6ft) within a 5km drone ‘no fly’ zone around the airport — but not within flight paths. The illegal drone flights will also be made in the early morning at a time when there would not be any scheduled flights in the air space to avoid any risk of posing a threat to aircraft.

The activists point out that the government recently declared a climate emergency — when it also pledged to reduce carbon emissions to net zero by 2050 — arguing there is no chance of meeting that target if the UK expands current airport capacity.

A press spokesman for the group, which is calling itself Heathrow Pause, told TechCrunch: “Over a thousand child are dying as a result of climate change and ecological collapse — already, every single day. That figure is set to significantly worsen. The government has committed to not just reducing carbon emissions but reducing them to net zero — that is clearly empirically impossible if they build another runway.”

The type of drones they plan to use for the protest are budget models which they say can be bought cheaply at UK retailer Argos — which, for example, sells the Sky Viper Stunt Drone for £30; the Revell GO! Stunt Quadcopter Drone for £40; and the Revell Spot 2.0 Quadcopter (which comes with a HD camera) for £50.

The aim for the protest is to exploit what the group dubs a loophole in Heathrow’s health and safety protocol around nearby drone flights to force it to close down runways and ground flights.

Late last year a spate of drone sightings near the UK’s second busiest airport, Gatwick, led to massive disruption for travellers just before Christmas after the airport responded by grounding flights.

At the time, the government was sharply criticized for having failed to foresee weaknesses in the regulatory framework around drone flights near sensitive sites like airports.

In the following months it responded by beefing up what was then a 1km airport exclusion zone to 5km — with that expanded ‘no fly’ zone coming into force in March. However a wider government plan to table a comprehensive drones bill has faced a number of delays.

It’s the larger 5km ‘no fly’ zone that the Heathrow Pause activists are targeting in a way they hope will safely trigger the airport’s health & safety protocol and shut down the airspace and business as usual.

Whether the strategy to use drones as a protest tool to force the closure of the UK’s largest airport will fly remains to be seen.

A spokeswoman for Heathrow airport told us it’s confident it has “robust plans” in place to ensure the group’s protest does not result in any disruption to flights. However she would not provide any details on the steps it will take to avoid having to close runways and ground flights, per its safety protocol.

When we put the airport’s claim of zero disruption from intended action back to Heathrow Pause, its spokesman told us: “Our understanding is that the airport’s own health and safety protocols dictate that they have to ground airplanes if there are any drones of any size flying at any height anywhere within 5km of the airport.

“Our position would be that it’s entirely up to them what they do. That the action that we’re taking does not pose a threat to anybody and that’s very deliberately the case. Having said that I’d be surprised to hear that they’re going to disregard their own protocols even if those are — in our view — excessive. It would still come as a surprise if they weren’t going to follow them.”

“We won’t be grounding any flights in any circumstances,” he added. “It’s not within our power to do so. All of the actions that have been planned have been meticulously planned so as not to pose any threat to anybody. We don’t actually see that there need to be flights grounded either. Having said that clearly it would be great if Heathrow decided to ground flights. Every flight that’s grounded is that much less greenhouse gas pumped into the atmosphere. And it directly saves lives.

“The fewer flights there are the better. But if there are no flights cancelled we’d still consider the action to be an enormous success — purely upon the basis of people being arrested.”

The current plan for the protest is to start illegally flying drones near Heathrow on September 13 — and continue for what the spokesman said could be as long as “weeks”, depending on how many volunteer pilots it can sign up. He says they “anticipate” having between 50 to 200 people willing to risk arrest by breaching drone flight law.

The intention is to keep flying drones for as long as people are willing to join the protest. “We are hoping to go for over a week,” he told us.

Given the plan has been directly communicated to police the spokesman conceded there is a possibility that the activists could face arrest before they are able to carry out the protest — which he suggested might be what Heathrow is banking on.

Anyone who flies a drone in an airport’s ‘no fly’ zone is certainly risking arrest and prosecution under UK law. Penalties for the offence range from fines to life imprisonment if a drone is intentionally used to cause violence. But the group is clearly taking pains to avoid accusations the protest poses a safety risk or threatens violence — including by publishing extensive details of their plan online, as well as communicating it to police and airport authorities.

A detailed protocol on their website sets out the various safety measures and conditions the activists are attaching to the drone action — “to ensure no living being is harmed”. Such as only using drones lighter than 7kg, and giving the airport an hour’s advance notice ahead of each drone flight.

They also say they have a protocol to shut down the protest in the event of an emergency — and will have a dedicated line of communication open to Heathrow for this purposes.

Some of the activists are scheduled to meet with police and airport authorities tomorrow, face to face, at a London police station to discuss the planned action.

The group says it will only call off the action if the Heathrow third runway expansion is cancelled.

In an emailed statement in response to the protest, Heathrow Airport told us:

We agree with the need to act on climate change. This is a global issue that requires constructive engagement and action. Committing criminal offences and disrupting passengers is counterproductive. Flying of any form of drone near Heathrow is illegal and any persons found doing so will be subject to the full force of the law. We are working closely with the Met Police and will use our own drone detection capability to mitigate the operational impact of any illegal use of drones near the airport.

Asked why the environmental activists have selected drones as their tool of choice for this protest, rather than deploying more traditional peaceful direct action strategies, such as trespassing on airport grounds or chaining themselves to fixed infrastructure, the Heathrow Pause spokesman told us: “Those kind of actions have been done in the past and they tend to result in very short duration of time during which very few flights are cancelled. What we are seeking to do is unprecedented in terms of the duration and the extent of the disruption that we would hope to cause.

“The reason for drones is in order to exploit this loophole in the health and safety protocols that have been presented to us — that it’s possible for a person with a toy drone that you can purchase for a couple of quid, miles away from any planes, to cause an entire airport to stop having flights. It is quite an amazing situation — and once it became apparent that that was really a possibility it almost seemed criminal not to do it.”

He added that drone technology, and the current law in the UK around how drones can be legally used, present an opportunity for activists to level up their environmental protest — “to cause so much disruption with so few people and so little effort” — that it’s simply “a no brainer”.

During last year’s Gatwick drone debacle the spokesman said he received many enquiries from journalists asking if the group was responsible for that. They weren’t — but the mass chaos caused by the spectre of a few drones being flown near Gatwick provided inspiration for using drone technology for an environmental protest.

The group’s website is hosting video interviews with some of the volunteer drone pilots who are willing to risk arrest to protest against the expansion of Heathrow Airport on environmental grounds.

In a statement there, one of them, a 64-year-old writer called Valerie Milner-Brown, said: “We are in the middle of a climate and ecological emergency. I am a law-abiding citizen — a mother and a grandmother too. I don’t want to break the law, I don’t want to go to prison, but right now we, as a species, are walking off the edge of a cliff. Life on Earth is dying. Fires are ravaging the Amazon. Our planet’s lungs are quite literally on fire. Hundreds of species are going extinct every day. We are experiencing hottest day after hottest day, and the Arctic is melting faster than scientists’ worst predictions.

“All of this means that we have to cut emissions right now, or face widespread catastrophe on an increasingly uninhabitable planet. Heathrow Airport emits 18 million tons of CO2 a year. That’s more than most countries. A third runway will produce a further 7.3 million tons of CO2. For all Life — now and in the future — we have to take action. I’m terrified but if this is what it will take to make politicians, business leaders and the media wake up, then I’m prepared to take this action and to face the consequences.”