The agency will join Munro's existing portfolio of market research firms, which include FDS International, Maven Research and field research specialist, acefieldwork.
The enlarged group turnover is forecast to exceed £10m in 2007.
M-Lab's clients also include Readers Digest, Save the Children, CMPi and Channel 4.
The agency was the lead quantitative research partner for Channel 4 in supporting its successful bid for the UK's second DAB multiplex digital radio franchise, confirmed by Ofcom in July this year.
Richard Hepburn, chief executive of Munro, said: "M-Lab is a fast growing business with an experienced team and an excellent track record in delivering research solutions to a range of blue-chip media clients.
"This acquisition adds proven expertise in media research to complement [our existing agencies]."Livingston said: "We have had an excellent three years building the M-Lab business but recognise that to reach the next stage of our development we needed to find a complementary strategic partner with a shared vision.
"Munro very much 'fits the bill' in this regard and we look forward to working with the teams at FDS, Maven and Acefieldwork in strengthening and broadening our offer to a wider range of media clients."
Munro's FDS agency focuses on telecoms, utilities and the public sector, while Maven focuses on automotive, financial services, business services and employee engagement research.
This article was first published on brandrepublic.com