Providing independent expert project assurance for the re-baselining of project budgets for Phase 1, Phase 2a and Phase 2b of the HS2 programme. aspire advise on best industry practice in relation to acquisition methodology, systems, risk management etc. and identify practical means of implementing our recommendations. We have worked closely alongside the HS2 client team and their strategic suppliers to pioneer the concept of real-time assurance, working collaboratively as part of the project team rather than auditing outputs at the end of the process. In this way we provide strategic advice to help define the brief, support suppliers in delivering the most robust acquisition cost estimates for the level of project maturity and put in place an additional line of defence to check that the brief has been adhered to and to test the logic of the cost estimates.