
According to the latest monthly ABCs, for March, the flagship Daily Mirror's circulation fell to a new low of 1,483,749. That represents a 4% year-on-year decline for the red-top.
Its sister Sunday paper posted a small percentage decrease over the year, while The People suffered a 10% slump from March 2007.
The group has appointed DLKW to its £3.5m creative advertising account amid a redesign of the Daily Mirror intended to bolster the title's falling circulation.
The agency will also be involved in developing work across Mirror Group's portfolio of national newspapers aimed at better reflecting their brand qualities.
The previous incumbent of 12 years, M&C Saatchi, parted company with Mirror Group in March, when the review began. At the time, the group said its business focus had changed and, as a consequence, its agency requirements had, too.
Mirror Group spent £6m on advertising last year, according to Nielsen Media Research. The group's media planning and buying business, will continue to be handled by ZenithOptimedia.