Joint has resigned the BHS account.
The agency won a five-way pitch for the Arcadia-owned business in 2013, and went on to create the fashion retailers' autumn collection campaign.
The Joint founders Damon Collins and Richard Exon said: "We've loved our time working with BHS, and are proud of the work that we produced together.
"However, with wholesale personnel changes at BHS, this is a good time to part company so we can focus on other opportunities in the market."
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