The move to a single company completes a process which began in 2007, when Guinness Partnership, previously Guinness Trust Group, was formed. At that point the organisation comprised 13 housing associations, which have been gradually reduced.oth are separate legal entities to Guinness Partnership. Guinness Partnership anticipates Guinness Developments will spend Â£45 million and generate up to Â£10 million of revenue a year over the next three years to cross-subsidise the core business.