Project delays remain one of the most significant and costly challenges facing major construction programmes across Europe — yet the factors driving them are shifting. Extreme weather, complex permitting regimes, supply-chain fragility, skills shortages, new materials, sustainability requirements, geopolitical tensions and increasingly ambitious engineering designs are combining to create unprecedented schedule uncertainty. As delay exposures grow, so does the question of responsibility: where delay risk sits within contractual structures, how liabilities are allocated among owners, contractors and subcontractors, and what insurers require to underwrite Delay in Start-Up (DSU) and delay-related claims. This session will examine the latest developments shaping project delays, drawing on real examples from across Europe to highlight the evolving causes, emerging patterns and key triggers that risk managers must understand.