The agency, which numbers the Liberal Democrats, the Evening Standard, the Met Office and the anti-fur charity Respect for Animals among its clients, will be rebranded under Media Square's Equanim name, which also includes the PR agency Equanim/Le Fevre.
Cramphorn was one of the founding partners of the agency, and had worked with Bean at his previous venture. He left the agency last month.
Bean was the one-time head of advertising of BT, one of the country's largest advertisers, before starting his own creative shop MC Bean in September 1994. That company split up two years later, reportedly after disputes over what kind of clients it should work for.
According to Bean: "The last 12 months have been very difficult for the independent players in our space. Joining forces with Media Square gives us a bigger stage to play on and will allow our team to make the most of their skills and experience."
Banc was founded in 1996 as Bean Andrews Norways Cramphorn to handle everything from advertising and branding to interior design. Founding partner Graeme Norways left the company in 1999.
Media Square was created in 2000 and is listed on the Alternative Investment Market. Late last year, it hired former finance director of rival group Incepta, Kevin Steeds, as chairman, as it embarked on a plan of expansion.
Steeds said Banc and its team of people represented an excellent acquisition for Media Square. He said the deal gave Media Square a good foothold in the London market and brings a high quality and very capable team of communications professionals into its group.
"We plan to merge the Banc business into Equanim Group, our integrated marketing communications business, as soon as practical. Robert Bean, formerly chairman of Banc and one of the advertising industries better known names, will continue to lead the business and has been ear-marked for a major role within Equanim," Steeds said.
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