Alan Willoner
Mott MacDonald
technical director
Join Alan Willoner and Lorenzo Allievi as they share insights into the Leeds Flood Alleviation Scheme.
This is one of the largest, most complex, and innovative flood defence schemes ever designed and constructed in the UK and was delivered by the D&B contractor Bam Mott MacDonald JV.
The scheme is 19km in length. It has a CAPEX value of approximately £200M and a wide range of geotechnical challenges and solutions including approximately 10,000 piles and 1,000 anchors constructed with constrained access.
The presentation aims to share the highlights, and the lessons learnt, on topics including restricted access piling, constructability, interface with third party assets, seepage analysis, earthworks, value engineering, health & safety and sustainability.
Mott MacDonald
technical principal
Lorenzo Allievi is a technical principal at Mott MacDonald Sheffield. He has 18 years of geotechnical design experience gained from his work across Europe, USA and UK, contributing to a diverse range of infrastructure, building and civil projects.

Uganda records among the highest road fatality rates in Sub-Saharan Africa. The presentation will examine the current road safety landscape, audit methodologies, and practical interventions for safer roads.

Whilst engineers struggle to adapt infrastructure for a changing climate, nature is already surviving and thriving in these conditions. Using a biomimicry approach, this presentation explores how organisms on the Isles of Scilly could inform climate resilience in the UK.

Explore the growing challenges of water management, including urban flooding, declining public trust and climate pressures. Learn about the barriers to implementation and discover why we need more industry-wide reflection on effective, scalable solutions.