(UTC+00:00) Dublin, Edinburgh, Lisbon, London
- Photon 2024, 3-6 September 2024, Swansea
- Photon 2022, 30 August-2 September 2022, Nottingham
- Photon 2020, 1-4 September 2020, Online
- Photon 2018, 3-6 September 2018, Birmingham
- Photon 2016, 5-8 September 2016, Leeds
- Photon 2014, 1-4 September 2014, London
- Photon 2012, 3 - 6 September 2012, Durham
- Photon 2010, 23-26 August 2010, Southampton
- Photon 2008, 26-29 August 2008, Edinburgh
- Photon 2006, 4-7 September 2006, Manchester
- Photon 2004, 6-9 September 2004, Glasgow
- Photon 2002, 2-5 September 2002, Cardiff