The original Phase 1 Hypo-Lias report was commissioned by a small group of industry sponsors and remains confidential to that group until 2019. The initial phase of the project was primarily focused around data from Norway and the Netherlands with some UK onshore analogue information. The OGA participated in Phase 1 of the Hypo-Lias project as a late entrant on the understanding that a subsequent UK Addendum could be made available for publication on completion. This delivery represents the work carried out as part of that addendum.