HS1 Data assurance

The aim of the data assurance review of HS1 Ltd is to assess the quality, accuracy and reliability of the quarterly data supplied by HS1 Ltd. This will done by performing:

• A high-level review of the performance measures - to include confidence grading and progress against the 2014 recommendations; • A high-level review of asset management measures - to include confidence grading and provide assurance that the improvements have been maintained and are continually improving; • A review of the asset register – to provide assurance that the high level of quality is maintained and is continually improving.

Additional information: Bids must be submitted to ORR's eTendering portal. Joining instructions to the portal is included in the ITT.

All bids must include a completed Form of Tender and Disclaimer form.