There are several artists and bands with this name:
These are photos from concerts where Plan B played, so they may be of other bands that played the concert as well.
T In The Park 2011 Jul 8 - 10, 2011 Kinross, Scotland, United Kingdom Uploaded by Craigf84
Glastonbury Festival 2011 Jun 22 - 26, 2011 Shepton Mallet, England, United Kingdom Uploaded by A Badger Faced Man
Adele / Plan B May 23, 2011 Detroit, Michigan, United States Uploaded by Sarah Stanley
Big Day Out 2011 Feb 4, 2011 Adelaide, South Australia, Australia Uploaded by Scotopic Lux