Bounds Green

Spencer Group were appointed by Network Rail to deliver the upgrade of Bounds Green Depot in order to accommodate the new IEP Azuma Trains. This was the last phase of the IEP Programmed Works which have involved delivering upgrades across 8 other depots and the first retractable overhead system to be installed for Network Rail in the country.

Key Project Details

Client Network Rail
Duration 11 months
Location London
Contract Form NR9

Project Scope

The scope of works at Bounds Green included:
• Installation of an elevated walkway
• Removal and replacement of lighting and heating
• Modification of Depot Protection Systems to allow for the installation of Interlock System
• OLE works on Road 11 including the installation of a retractable OLE conductor beam and
associated works
• Alterations to the door aperture to cater for the OLE works
• Provision of a new runway beam with 2 powered trolleys and chain hoists, each with a capacity of 1.5t over road 11
• Provision of a separate runway beam for the attachment of man-safe fall arrest equipment

In order to successfully deliver the works, we collaborated with the depot operators to conduct progressive possessions across the rail lines, whilst maintaining the operation of the remaining lines, with 3 trains scheduled to enter the depot each day. In order to minimise disruption, we installed hoardings within the depot to separate our works from the operational lines.

We overcame a number of issues during the contract, for example, once work began on site, we noticed that cables were not located where surveys had suggested them to be. We therefore worked collaboratively with the depot owners to safely identify these cables.

Throughout the project we worked closely with Network Rail to propose alternative and innovative methods to improve efficiency and reduce disruption to the operational depot. This included utilising an alternative concrete method in order to remove large sections of the ground in slabs rather than breaking it up.

The project involved

Installation of an elevated walkway
Removal and replacement of lighting & heating


The project involved the installation of a retractable OLE beam, the first of its kind for Network Rail. We therefore maintained a close relationship with our Client’s representatives to ensure they were continually updated on our progress and construction methods to assure them of our proposal. The project manager therefore held regular meetings with Network Rail and circulated all information on current works and project milestones to ensure a ‘one team approach’ throughout. As a result, Spencer Group received high praise from Network Rail for our successful delivery and collaborative approach to work.

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The project involved

Installation of interlock system