The Challenge The M25 is a 117-mile (188 km) highway that encircles Greater London, making it the second largest orbital road in Europe. Skanska was awarded the contract to widen two sections of road to increase the number of lanes and to refurbish the ¾ mile long Hatfield road tunnel. The contract value was in excess of £1 Billion (over $1.6b) and represented a major step change in UK infrastructure procurement in terms of scale and ri

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