New Energy World™
New Energy World™ embraces the whole energy industry as it connects and converges to address the decarbonisation challenge. It covers progress being made across the industry, from the dynamics under way to reduce emissions in oil and gas, through improvements to the efficiency of energy conversion and use, to cutting-edge initiatives in renewable and low-carbon technologies.
This month, the UK’s National Grid will start work to refurbish the final 40-km section of high-voltage overhead electricity transmission line running from the Mannington substation in East Dorset to the Nursling substation in Southampton, Hampshire.
The project includes structural maintenance and technical upgrades across 115 steel pylons along the transmission route as part of ongoing grid modernisation efforts. Technicians will remove the existing overhead cabling and install new, modern cabling, as well as replacing the associated mechanical fittings and insulators. This work is the final phase of refurbishment on the line that began in 2022.
The overhead line refurbishment coincides with a separate capacity upgrade at the western end of the circuit. On 23 May 2026, a 120-tonne supergrid transformer arrived at the Mannington substation to increase local transmission capacity. The transmission line refurbishment is scheduled to finish in November.
