By Jon Robinson Adverts featuring Dragons’ Den star Steven Bartlett for nutrition brands Zoe and Huel have been banned after it was ruled they failed to disclose their commercial relationship with the celebrity entrepreneur. The Advertising Standards Authority (ASA) has said the adverts, which were seen on Facebook in February, “omitted material information” about their links to Bartlett. Bartlett, who made his fortune after co-founding Social Chain in Manchester, is an investor in Zoe and a director at Huel. Zoe offers health testing and dietary advice services while Huel is known for its vit…