"Sigma" can refer to;
These are photos from concerts where Sigma played, so they may be of other bands that played the concert as well.
Sigma / The Kooks / The Darkness / David Rodigan / Brooke Combe / Rick Parfitt Jnr Aug 2 - 4, 2024 Silverstone, England, United Kingdom Uploaded by Jamest54
Love Saves The Day 2024 May 25 - 26, 2024 Bristol, England, United Kingdom Uploaded by Richard Hughes
Reading Festival 2022 Saturday Aug 27, 2022 Reading, England, United Kingdom Uploaded by Georgieehiggo
Reading Festival 2022 Saturday Aug 27, 2022 Reading, England, United Kingdom Uploaded by Eva Ralley
Reading Festival 2022 Aug 26 - 28, 2022 Reading, England, United Kingdom Uploaded by Beth Bowden
