In-depth contractor engagement during the concept and detailed design phases of the Bank Station Capacity Upgrade project led to an optimised tunnel design with significant improvements in risk management. Regular, coordinated meetings between the design and construction teams led to innovative construction solutions utilised in eliminating risks where possible and where not possible, controlling them through best practice. This paper outlines the lessons learnt from other tunnelling projects in London and presents how the risks related with SCL works have been dealt with in the tunnels design for the Bank Station Capacity Upgrade project.