A list revealing some of the members of the group which is advising the government over the coronavirus outbreak has been published.
The group's membership had been kept secret up to this point on security and independence grounds, however individual members had been able to disclose their participation.
Sage is a group of experts providing scientific and technical advice to support decision makers during emergencies.
Membership changes based on the expertise needed to address the crisis the country is faced with.
The government has been receiving advice from Sage twice a week since the first meeting on coronavirus on January 22 - it is the group advising ministers on when to relax lockdown restrictions.
The government website revealing the Sage membership said the list includes "names of participants who provided input as experts at one or more meetings, including public servants who acted in an expert capacity".
The website added how meetings are "also regularly attended by officials from Her Majesty’s Government. These attendees have not been named".
It said permission to publish names was requested from all participants and those who did not give permission have not been named.
Those on the list include well known names such as England's Chief Scientific Advisor Sir Patrick Valance and England's Chief Medical Officer Professor Chris Whitty.
Others on the list are Prof Whitty's deputies Dr Jenny Harries and Professor Jonathan Van Tam, and Public Health England medical director Professor Yvonne Doyle.
That sparked calls from opposition MPs for the membership of Sage to be released because, as Labour's shadow health secretary Jon Ashworth said, "ministers have repeatedly claimed timing of lockdown was based on science".
Sir David King, who worked under Tony Blair and Gordon Brown, created the board to emphasise the “importance of transparency”.
Commons science and technology committee chairman Greg Clark welcomed the publication of the Sage list.
The Conservative MP said: “I strongly welcome the commitment to transparency made by Sage in publishing the names of the members.
“This was something my committee called for in order to provide public reassurance that Government decisions are informed by a broad and substantial body of expert advice.”
The partial list of sage membership:
Sir Patrick Vallance - Government Chief Scientific Adviser
Professor Chris Whitty - Chief Medical Officer and Chief Scientific Adviser, Department of Health and Social Care
Professor John Aston - Chief Scientific Adviser, Home Office
Professor Wendy Barclay - Imperial College London
Professor Phil Blythe - Chief Scientific Adviser, Department for Transport
Professor Ian Boyd - University of St Andrews
Professor Andrew Curran - Chief Scientific Adviser, Health and Safety Executive
Dr Gavin Debrera - Public Health England
Professor Sir Ian Diamond - National Statistician, Office for National Statistics
Professor Yvonne Doyle - Medical Director, Public Health England
Professor John Edmunds OBE - iLondon School of Hygiene and Tropical Medicine
Professor Sir Jeremy Farrar - Director, Wellcome Trust
Professor Neil Ferguson OBE - Imperial College LondonDr Aidan Fowler FRCSNational Health Service England
Professor Julia Gog - University of Cambridge
Dr David Halpern - Behavioural Insights Team, Cabinet Office
Dr Jenny Harries OBE - Deputy Chief Medical Officer
Dr Demis Hassabis - Personal capacity as a data scientist
Professor Peter Horby - University of Oxford
Dr Indra Joshi - NHSx
Professor Dame Theresa Marteau - University of Cambridge
Professor Dame Angela McLean - Chief Scientific Adviser, Ministry of Defence
Professor Graham Medley - London School of Hygiene & Tropical Medicine
Professor Andrew Morris - University of Edinburgh
Professor Carole Mundell - Chief Scientific Adviser, Foreign and Commonwealth Office
Professor Cath Noakes - University of Leeds
Dr Rob Orford - Welsh Government
Professor Michael Parker - University of Oxford
Professor Sharon Peacock - Public Health England
Professor Alan Penn - Chief Scientific Adviser, Ministry of Housing, Communities and Local Government
Professor Steve Powis - National Health Service England
Dr Mike Prentice - National Health Service England
Mr Osama Rahman - Chief Scientific Adviser, Department for Education
Professor Venki Ramakrishnan - Ex Officio as Chair of DELVE, convened by the Royal Society
Professor Andrew Rambaut - University of Edinburgh
Professor Tom Rodden - Chief Scientific Adviser, Department for Digital, Culture, Media and Sport
Professor Brooke Rogers OBE - Kings College LondonDr James RubinKings College London
Professor Calum Semple - University of Liverpool
Dr Mike Short CBE - Chief Scientific Adviser, Department for International Trade
Dr Gregor Smith - Scottish Government Chief Medical Officer
Professor Sir David Spieglhalter - University of Cambridge
Professor Jonathan Van Tam MBE - Deputy Chief Medical Officer
Professor Russell Viner - University College London
Professor Charlotte Watts - Chief Scientific Adviser, Department for International Development
Professor Mark Walport - UK Research and Innovation
Professor Mark Woolhouse - University of Edinburgh
Professor Lucy Yardley - University of Bristol
Professor Ian Young - Northern Ireland Executive
Professor Maria Zambon - Public Health England