There are multiple bands with the name Oaf:
These are photos from concerts where Oaf played, so they may be of other bands that played the concert as well.
Bloodstock Open Air 2015 Aug 6 - 9, 2015 Walton-on-Trent, UK Uploaded by Gwyn Williams
Bloodstock Open Air Festival 2013 Aug 8 - 11, 2013 Derby, England, United Kingdom Uploaded by Jason French
Download Festival 2011 Jun 10 - 12, 2011 Derby, England, United Kingdom Uploaded by Nova Gullen