22 September - 23 September 2012 Gloucester Guildhall, 23 Eastgate Street, Gloucester, Gloucestershire, GL11NS
First launched in 2010, Underground Festival is a showcase for the best upcoming bands.Underground Festival takes places at Gloucester Guildhall over the last weekend of September.
| Bastille | Main Stage |
| Peace | Main Stage |
| SWIM DEEP | Main Stage |
| The Struts | Main Stage |
| Last Dinosaurs | Main Stage |
| Hey Sholay | Main Stage |
| Binary | Main Stage |
| Bluebell | BBC Introducing Stage |
| Sons and Lovers | BBC Introducing Stage |
| Young Kato | BBC Introducing Stage |
| Treetop Flyers | Risk and Consequence Stage |
| the night | Risk and Consequence Stage |
| Pale Seas | Risk and Consequence Stage |
| Duologue | Risk and Consequence Stage |
| Lexy | Risk and Consequence Stage |
| Lower Than Atlantis | Main Stage |
| Canterbury | Main Stage |
| Don Broco | Main Stage |
| Proxies | Main Stage |
| The Dangerous Summer | Main Stage |
| All Of This | Main Stage |
| Transit | Main Stage |
| Harbour | Main Stage |
| Venice | BBC Introducing Stage |
| The Social Club | BBC Introducing Stage |
| FEAR OF MEN | Risk and Consequence Stage |
| Cut Ribbons | Risk and Consequence Stage |
| Gunning For Tamar | Risk and Consequence Stage |
| The Physics House Band | Risk and Consequence Stage |
| Antibang | Risk and Consequence Stage |
| Artist | Stage | Day |
| All Of This | Main Stage | Sun 30th |
| Antibang | Risk and Consequence Stage | Sun 30th |
| Bastille | Main Stage | Sat 29th |
| Binary | Main Stage | Sat 29th |
| Bluebell | BBC Introducing Stage | Sat 29th |
| Canterbury | Main Stage | Sun 30th |
| Cut Ribbons | Risk and Consequence Stage | Sun 30th |
| Don Broco | Main Stage | Sun 30th |
| Duologue | Risk and Consequence Stage | Sat 29th |
| FEAR OF MEN | Risk and Consequence Stage | Sun 30th |
| Gunning For Tamar | Risk and Consequence Stage | Sun 30th |
| Harbour | Main Stage | Sun 30th |
| Hey Sholay | Main Stage | Sat 29th |
| Last Dinosaurs | Main Stage | Sat 29th |
| Lexy | Risk and Consequence Stage | Sat 29th |
| Lower Than Atlantis | Main Stage | Sun 30th |
| Pale Seas | Risk and Consequence Stage | Sat 29th |
| Peace | Main Stage | Sat 29th |
| Proxies | Main Stage | Sun 30th |
| Sons and Lovers | BBC Introducing Stage | Sat 29th |
| SWIM DEEP | Main Stage | Sat 29th |
| The Dangerous Summer | Main Stage | Sun 30th |
| the night | Risk and Consequence Stage | Sat 29th |
| The Physics House Band | Risk and Consequence Stage | Sun 30th |
| The Social Club | BBC Introducing Stage | Sun 30th |
| The Struts | Main Stage | Sat 29th |
| Transit | Main Stage | Sun 30th |
| Treetop Flyers | Risk and Consequence Stage | Sat 29th |
| Venice | BBC Introducing Stage | Sun 30th |
| Young Kato | BBC Introducing Stage | Sat 29th |
Gloucester Guildhall, 23 Eastgate Street, Gloucester, Gloucestershire, GL11NS
Underground Festival