Ocado Park Royal

Scope of Works

Ocado required a high-voltage network extension at their Park Royal facility to support future EV charging operations and increased site demand. The project was designed and delivered in full compliance with UK Power Networks (UKPN) standards.

• Substation Design & Acceptance – Completed detailed design for two new substations, including specification of Lucy Electric VRN6a RMUs with Argus 7SR11 relay protection and associated HV metering, approved by UKPN.
• Civil Works – Excavation and reinstatement of on-site and off-site cable trenches and joint holes, including installation of ducts, draw ropes, trench bedding, blinding material, and marker tape.
• Cabling – Supply and installation of HV mains underground cables from the 11kV point of connection to the new substations, including all associated terminations.
• Substation Construction – Installation of two GRP housings and concrete plinths, together with earthing systems in line with UKPN cold-site standards.
• Switchgear & Protection – Installation and termination of HV/LV switchgear, protection systems, metering, and emergency tripping facilities.
• Non-Contestable Interface – Liaison with UKPN for design approval, spiking, closing joints, and final energisation.

Project Considerations

Flood and Environmental Constraints:

MAGIC map searches confirmed the site has no statutory environmental designations (SSSI, AONB, Scheduled Monuments) and is at low risk of flooding from rivers, sea, or surface water. Environmental compliance was maintained throughout, including controls on jointing resins, solvents, and reinstatement materials to meet UKPN requirements.

Urban Location and Traffic Management:

The project took place within Origin Business Park, requiring strict planning around traffic-sensitive roads. Excavation and reinstatement works triggered the need for Section 50 licensing, temporary traffic lights, and out-of-hours working to minimise disruption to local businesses and road users.

Operational and Site Constraints:

Space within the business park was limited, so plant and material storage had to be pre-agreed and coordinated with HIAB deliveries. Excavations were carried out across mixed ground conditions, including old, scarred surfaces and broken slabs, which increased the need for safe reinstatement practices.

Safety, Utilities and Stakeholders:

A desktop assessment under ESQCR 2002 confirmed the substations to be low risk for interference or vandalism, requiring no mandatory mitigation. Excavations were undertaken close to fibre optics, overhead lines, and gas mains, necessitating CAT scanning, trial holes, and close monitoring. Secure access routes were maintained for tenants, and disruption to neighbouring businesses was minimised through proactive stakeholder liaison. Emergency planning included identification of the nearest A&E facility, Ealing Hospital, 6 miles away, to support health and safety procedures.

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