Sanctuary Housing Group has suddenly emerged as Cosmopolitan's "new preferred partner" after its chances of a merger with Riverside fell apart. Cosmopolitan Housing Group (CHG) had been in discussions with Riverside Group Ltd over a possible merger since last year. However, after a due diligence process came to an end last week, Riverside's board decided that it could not give CHG the unconditional merger offer it requested due to uncertainty over the scale of the potential risk around CHG's stu...