There are at least two bands called The Union.
These are photos from concerts where The Union played, so they may be of other bands that played the concert as well.
SW4 Festival 2011 Aug 27 - 28, 2011 London, England, United Kingdom Uploaded by Maf Daniel
Thin Lizzy / Supersuckers / The Union Jan 23, 2011 London, England, United Kingdom Uploaded by Stephen Grimes