High Barnet Train Crew Accommodation, High Barnet, London 2009

High Barnet Building 01

A terminal train crew accommodation was required at High Barnet as part of the Northern Line Operational Strategy.

wpa programme managed the project for TfL from the outset

• Putting together the business case for the initial funding paper
• Preparing briefing documents for and tendering the feasibility and detail design study.
• Programming the project in Primavera P3e from the outset.
• Analyzing the feasibility study and devising a logistics strategy for the complex build.
• Composing the outsourced assurance strategy to ensure that works would be handed over
• Compiling the build phase tender (NEC Option B) information and overseeing the tender process to award.

Build phase works were project managed by LUL's Greg Dixon & LUL's Sherif Narouz with wpa providing design oversight during the construction.

High Barnet Building 02
Complex aspects of the design included:

• Choosing the final location from a wide range of sites available on the basis of proximity, technical risk, programmatic impact and economic efficacy
• Designing a cost effective structure immediately adjacent to the railway (spanning the critical boundary cable run)
• Installing a new link bridge connecting the new building to platform 1 (and installing a new bridge stem on the platform ramp between two signal pillars)
• Deploying a bottom driven pile solution adjacent to the railway
• Producing an assurance strategy in relation to the complex site, complex asset adoption arrangements (the asset required to be handed into the Tubelines maintenance regime) and emergent technology which had not been used on the railway before
• Track assurance in relation to the adjacent bottom driven piling
• Deploying a new architect half way through the design process and ensuring fluidity of contractual obligations and design integrity.
• Interfacing and extending all station systems (cctv, fire, PAVA) whilst allowing the station to function normally.
• Managing a complex power interface including building a new substation.
• Connecting to local infrastructure at range

The final building is sited approximately 5m from the railway tracks and spans over the existing cable run.


Pile foundations support a suspended insitu concrete ground floor slab, structural steel frame with composite metal decking flooring system and Kingspan insulated wall cladding with a plant room sited on the roof.


The steel footbridge was fabricated in Northern Ireland and installed over railway tracks to the island platform. The bridge is supported by a concrete filled trestle on the platform and cantilevered from the steel frame on the side of the building.