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National Grid's eyes in the sky - how helicopters are helping keep Britain's electricity flowing

NATIONAL Grid's fleet of high tech helicopters is patrolling pylons and power lines across the country; a high wire act they have been performing for over half a century to keep the electricity network in good health all year round.

Hovering near the high voltage cables that carry power around Britain is all in a day's work for the helicopter teams, who are closely monitoring the condition of the thousands of towers, poles and cables that get electricity to where it's needed.

With so much critical infrastructure being monitored each year ahead of winter, the aircraft collectively clock up around 4,700 hours of flight time and cover 32,000 miles of network annually on their patrols. It's a job the helicopter units have been doing since the 1960's when the Central Electricity Generating Board (CEGB) 1st took to the air.

Today the company operates 8 helicopters across its networks; 3 to monitor the 22,000 pylons, 300 substations and 4,300 miles of high voltage overhead line that make up the transmission network in England and Wales; and 5 to cover the 60,000 miles of lower voltage overhead line on its distribution network that connects to homes and businesses.

Find out more about the difference between National Grid's networks... You can't miss them; the distribution network helicopters operating in the Midlands, South West and South Wales are bright yellow, and the transmission network helicopters covering all of England and Wales are in National Grid's white and blue livery.

What are the helicopters looking for? A skilled team in each helicopter is looking for damaged parts, wear and corrosion on the pylons and cables; but they're also looking for other potential issues in the area like vegetation growing too close to a line.

They have even helped rescue livestock they have spotted stuck in bogs and ditches, by calling it in to local landowners.

An experienced pilot keeps the helicopter's movements steady while specialist observers gather the imagery needed by network engineers; so you might see 1 of the aircraft flying close to an electricity line briefly before moving on.

The teams also have state of the art electro optics such as thermal imaging cameras at their fingertips to help identify issues like 'hot spots' on overhead lines; a rare occurrence but an indication of an overheating joint that will need fixing to avoid future faults.

Why are the helicopter checks important? Aerial surveys are safer, more cost effective and less resource-intensive than climbing the entire network of pylons or inspecting the wood poles by foot. It might take 3 lineworkers on the ground several days to carry out inspections on a handful of towers that would take an airborne observer just hours to inspect.

Crucially the helicopter teams' work can spot potential issues before they go wrong, feeding back insight for National Grid's overhead line maintenance teams to take action on if needed.

It is estimated that for the cost of running the transmission network's helicopters, there's a tenfold cost saving in refurbishment and fault prevention on the high voltage grid.

What if a helicopter can't be used? In some cases pylons and lines can't be inspected by helicopter, for example those in areas that may distract drivers or disturb livestock.

National Grid has a fleet of drones in its arsenal; and a team of skilled operators; for use in these situations. The drones are equipped with similar technologies to the helicopters to help identify issues on the network; the company is even trialling autonomous drones.

While drones have benefits in terms of cost and efficiency, helicopters have their own advantages - they can cover longer distances, and they don't require access to the land close to powerlines.

The teams behind the helicopter operation... Across both National Grid's transmission and distribution networks, the helicopter teams are operated by 25 full-time staff, including 8 pilots and 8 observers.

The transmission network unit is based in Oxford, while the distribution network operation is based in Bristol and has an in-house maintenance engineering team.

John Rigby is chief pilot at National Grid covering the transmission network, bringing to the role 32 years flight experience with the Royal Air Force, Air Ambulance and National Grid. He said:- "Our priority is to check the condition of the network's overhead lines and substations to confirm they are shipshape all year round. That means flying closer to the electricity infrastructure than general aviation are allowed, which concentrates the mind, but it's a very safe and controlled operation, 1 that our experienced teams have been carrying out for decades. Predicting where we will be on any given day is difficult as we can be quite weather dependent. We're a small, flexible and nomadic team, staying overnight where the weather and work takes us rather than going back and forth from our Oxford base."

Simon Richards, helicopter observer team manager for National Grid's distribution network, said:- "As an observer on the distribution network it's our role to navigate the pilot and aircraft to inspect the overhead network of wood poles and towers across the Midlands, South West and South Wales. Our yellow aircraft are normally spread across that area, so can reach anywhere on the National Grid distribution network within 30 minutes. Spotting issues from the air is easier said than done; at normal patrol speeds we will pass a pole every 10 or so seconds, so it can be quite intense and at times challenging. But we have technology to help us, including thermal cameras and a LiDAR system."

Both the helicopter operations and regular nationwide ground based patrols by overhead line teams are crucial in making sure electricity networks are in prime condition ahead of winter.

The teams are part of over £1 billion worth of annual investment by National Grid in maintaining and upgrading its infrastructure to ensure a resilient network for homes and businesses in England and Wales.

Overall a 4,000-strong operational field staff works 365 days a year across National Grid's transmission and distribution networks to keep the grid safe and reliable.

Remember, remember the threat of November

AS darker nights draw in this autumn, stolen vehicle recovery expert, Tracker Network (UK) Ltd, reveals October to December are the most active months of the year for criminals stealing cars, and warns that thefts peak in November. With the Home Office reporting 101,198 vehicle thefts in 2021, motorists need to be extra vigilant about security during the countdown to Christmas.

"It's probably unsurprising that the darker nights lead to an increase in the number of vehicles being stolen, as it offers thieves a greater window of opportunity to act undetected. However, our data strongly indicates that November is a time people should be most on their guard. Whilst the theft of a vehicle is hard to bear at any time, with the cost of living crisis having a significant impact on most people's finances, the burden could be all the greater this autumn."
comments Clive Wain, Head of Police Liaison at Tracker.

It's not just high value vehicles such as prestige 4x4s that are hot targets for thieves, reports Tracker. A global lack of good quality used vehicles, alongside spare parts shortages, are increasing the desirability of older, lower value cars, vans and motorcycles. Vehicles are often stolen and stripped for their parts in chop shops or stolen to order to be shipped abroad to meet international demand.

Continues Clive Wain:- "We always encourage drivers to use traditional security deterrents such as crook locks and wheel clamps to deter criminals and protect their vehicles. An investment in smart doorbells or a CCTV system are also increasingly popular amongst those keen to guard against unwanted visitors. However, in the event of a theft, stolen vehicle tracking technology will significantly help Police quickly close the net on thieves and return the vehicle to its rightful owner."

Tracker has an unrivalled stolen vehicle recovery rate of more than 95%, with 80% of those stolen vehicles recovered within 24 hours, thanks to its exclusive nationwide partnership with the UK's Police. Tracker's solutions work like an electronic homing device. A covert transmitter is hidden in 1 of several dozen places around the vehicle. There is no visible aerial, so the thief won't know it's there. VHF technology unique to Tracker makes its units resistant to GPS/GSM jamming, confirming Tracker as a superior security defence against determined thieves.

Tracker's Security Advice:-

  At home, don't keep keys in a place where they can be seen or accessed from outside.

  If your vehicle has a keyless car entry system consider storing your keys; both sets; in a metal tin or Faraday pouch to block the signal against relay attack technology.

  Never leave the keys in the vehicle's ignition when you are stepping away from the vehicle, even if you are just jumping out quickly.

  Never leave your car running unattended when de-icing.

  Always lock and secure your vehicle.

  Do not leave belongings or technology items on display, such as satnavs or mobile telephones. Take them with you or lock them in the boot.

  Never leave car documents or spare keys inside the car - this only makes it easier for thieves to sell it on.

  Park in busy or well-lit and attended car parks near CCTV cameras.

  If you have a garage, use it to park your car.

  Consider fitting a tracking device to help Police recover your vehicle if it's stolen.


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