What's on

Maggie Simpson, Policy Manager, Rail Freight Group Nigel Jones, Head of Planning and Strategy, DB Schenker Christopher Snelling, Head of Supply Chain Policy, Freight Transport Association Michael Roberts, Chief Executive Officer, Association of Train Operating Companies Paul Plummer, Group Strategy Director, Network Rail Jeremy Candfield, Director General, Railway Industry Association Dr Richard Wellings, Deputy Editorial Director, Institute of Economic Affairs Kaj Mook, Head of Customer Service Transition, Merseyrail Joel Brook, Property Director, Select Service Partners Simon Rutter, Director, Solum Regeneration

Phil Bentley, Managing Director, British Gas Guy Esnouf, Head, Corporate and Internal Communications, E.ON UK Stephen Fitzpatrick, Managing Director, Ovo Energy Alistair Phillips-Davies, Generation and Supply Director, SSE Neil Clitheroe, Chief Executive for Energy Retail and Generation, Scottish Power Ed Gill, Head of External Affairs, Good Energy Martin Lawrence, Managing Director for Energy Sourcing and Customer Supply, EDF Energy David Mannering, Director of Economic Regulation, RWE npower

Professor Sir Peter Rubin, Chair of Council, Niall Dickson, Chief Executive and Registrar Una Lane, Director, Continued Practice and Revalidation, and His Honour David Pearl, Chair, Medical Practitioners Tribunal Service

Ian Readhead, Director of Information, Association of Chief Police Officers Merilyne Knox, Head of Public Access Office, Metropolitan Police Jean Gonié, Director of Privacy EU Affairs, Microsoft Sietske de Groot, Senior EU and International Affairs Policy Adviser, Federation of Small Businesses Christopher Graham, Information Commissioner, Information Commissioner's Office David Smith, Deputy Commissioner and Director of Data Protection, Information Commissioner’s Office

Deputy Assistant Commissioner Sue Akers, QPM, Metropolitan Police

Sir Denis O’Connor CBE QPM, former HM Chief Inspector of Constabulary

Stephen Greenhalgh, Deputy Mayor of London for Policing and Crime

Members of Parliament

Sir William Patey, former UK Ambassador of Afghanistan Sir Rodric Braithwaite, author of Afgantsy

Professor Peter Sommer, Visiting Professor ,De Montfort University Cyber Security Centre Professor Ross Anderson, Professor of Security Engineering, Cambridge University Computer Laboratory Professor Sadie Creese, Professor of Cybersecurity, Department of Computer Science, University of Oxford Glyn Wintle, Chief Consultant, Firewolf

The Rt Hon John Gummer, Lord Deben, the Government's preferred candidate for Chair of the Committee on Climate Change