Full three-hour route along M25 in Essex huge 155-tonne transformer will travel to substation

An abnormal load will travel from Essex to Surrey. File image
-Credit: (Image: Sean Stewart)


A huge transformer weighing 155-tonnes will be transported from Essex to Surrey overnight on Saturday (November 16). The new super grid transformer is being transported on a lengthy route along the M25 in Essex to it's destination.

The transformer - weighing the equivalent of 25 African elephants - will make its way from the Port of Tilbury on the evening of November 16. It will arrive at the substation in the early hours of Sunday morning.

Transformers play a vital role in helping to ensure the UK continues to enjoy safe and reliable energy supplies. They step voltage up or down so electricity can be efficiently transmitted from power generators or safely distributed to homes and businesses via regional networks.

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The transformer will be delivered on a large specialist vehicle travelling at a maximum speed of 12 mph with a police escort. The convoy travels from Tilbury via the M25, leaving at junction 11 around midnight. It's expected to arrive at the substation around 3am.

From the Wisley Interchange it will travel west on the A320 St Peter's Way before turning left at the Ottershaw roundabout onto the A320 and continue into Chertsey Road A320. At Six Crossroads Roundabout it turns left onto A425 Woodham Lane, continuing on B385 Woodham Lane under the M25. At New Haw Lock the convoy turns right onto the A318 Byfleet Road.

The route has been carefully planned in collaboration with highway authorities and the police to minimise disruption. The vehicle will have a police escort to help manage traffic and some street furniture will be temporarily removed, so the transporter convoy can make its way to the substation. Traffic travelling at this time may be held briefly to allow the convoy to pass.

Mark Ellis, Project Manager for National Grid, says: “This transformer movement has been many months in the planning and we work hard to minimise any disruption that deliveries of this kind can cause. The movement is occurring at this time to try and minimise disruption to the local road network. Noise will be kept to a minimum. We appreciate the cooperation and understanding of the local community during this vital work maintaining the resilience of our energy network.”