Lessons Learned Summary

What went well and what could have been improved on the Bermondsey Dive Under and Structure Strengthening project, including recommendations for future schemes

The Bermondsey Dive Under was constructed, as part of the Thameslink Programme, to minimise conflicting crossing moves between the Sussex lines and Kent lines at South Bermondsey Junction.

Grade separating the junction enabled Blackfriars-bound Thameslink trains (from the Sussex lines) and Charing Cross-bound trains (from the Kent lines) to cross, without train path confliction, before entering the reconfigured London Bridge station.

The remit for Structure Strengthening Project was to provide Route Availability – RA8 capacity for the existing structures carrying track affected by the Thameslink Programme realignment works between Waterloo East and New Cross stations.

This case study summarises the key lessons from what went well on the project including: integrated planning and relationship management, management of third party relationships, integrated working, change management, value engineering and scheme handback and close-out. It also looks at what could have been improved, including contract content, contract administration and rework/redesign costs, and proposes recommendations for future schemes.