Ayesa was appointed by Murphy to develop a solution utilising secant pile techniques. Originally diaphragm walling was specified due to the depth of the shaft. The final design challenged traditional techniques as it pushed the limits of acceptable secant pile depths in the UK. The project was the winning entry in the Concrete Society Awards Civil Engineering category. This recognised the innovative use of the permanent lining as temporary ring beams whilst maintaining a high-quality finish, in addition to the innovations incorporated into the secant pile design.