Case study: Crossrail Anglia

BTS Ltd. was engaged from 2018 through to mid 2026 to provide the Designated

Project Engineer (DPE) and Senior E&P Project Engineer (PE) resource for the 25kV

electrification scheme upgrade between Bow in East London and Shenfield. The

DPE role was to oversee the engineering and assurance for the conversion from

25kV 'classic' electrification to +/- 25kV autotransformer electrification for the NE

spur of the Elizabeth Line, whilst the PE role was to provide technical competence

with 25kV electrification.

The scope under DPE and PE responsibility were OLE upgrades and associated

civils, four new 25kV autotransformer traction power sub-stations at Pudding Mill

Lane, Ilford, Gidea Park and Shenfield, 25km of new autotransformer feeder,

earthing and bonding enhancements, Ilford Depot improvements and the

replacement of 7 signalling power Principal Supply Points (PSP).

In addition to the technical spects, the DPE scope included the following:

• Application of CSM-RA and management of the Project Hazard Record
• Liason with TfL, DLR and ORR to seek required approvals
• Liason with National Grid to achieve power quality compliance
• Attendance at Anglia Region Safety Review Panel (SRP)
• Systems assurance via Form E, Form F and ECC
• Handback and Health & Safety files

The BTS deployed DPE was engaged at GRIP stage 3 and stayed in role until

completion of GRIP stage 8.