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Bridge and view of the Thames

Thames Tideway Tunnel: early review of potential risks to value for money

The Thames Tideway Tunnel is a planned project to build a large sewer running under the River Thames. It is the Government’s preferred solution to the problem of spills from London’s sewers into the tidal part of the Thames. In response to correspondence, we explain the roles of the different parties, identify potential risks to value for money and set out what we expect good project management to look like. To avoid influencing the outcome of ongoing competitions for the construction and financing of the project, we do not evaluate the value for money of the project and the issues raised do not imply any audit judgement about its performance.

Published:
5 Jun 2014
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Over-optimism in government projects

Optimism bias in public sector projects is not a new phenomenon. But it is one that persists, frequently undermining projects’ value for money as time and cost are under estimated and benefits over estimated. This report uses our back catalogue to illustrate the consequences of over optimism. In doing so, we have identified some contributory factors – such as project complexity and an organisation’s culture of challenge.

Published:
19 Dec 2013