“As engine control technology governs the way fuel is burnt as well as the amount of fuel consumed, our findings have projected a reduction in CO2 emissions of at least 25%.

“This has allowed BT to enhance its commitment to reducing its environmental impact, while making fuel cost savings for the long-term.

“The technology is fully transferable, which has prompted BT Fleet to develop plans to deploy it to other vehicle types, including specialist vehicles and cars.”

Top tips for fuel-efficient driving

• Plan your journey to avoid congestion areas and optimise multiple delivery trips.
• Make sure the vehicle is regularly serviced and maintained.
• Stick to speed limits: 70mph uses
• 9% more fuel than 60mph and 15% more than 50mph. Driving at 80mph uses 25% more than 70mph.
• Ensure tyres are correctly inflated at all times to reduce wasted fuel and to ensure the van is safe to drive.
• Don’t be idle – there is no reason for engines to be switched on when the vehicle isn’t moving, unless you are at a traffic light or stuck in a jam. If you are going to be stationary for more than one minute, switch off your engine.
• Keep the vehicle moving smoothly and anticipate the road conditions ahead. By looking ahead and being observant, you can avoid harsh braking which increases wear and tear on the brakes and tyres and is dangerous.
• Select the right gear and change up early to reduce fuel use.