Housebuilder continue to increase activity as the housing market strengthens.Bellway expects its legal completions to increase by around 20% for its year ending July 31 2014. The increase has been driven by the “continued strength of consumer demand, together with an acceleration of construction programmes,” the housebuilder said.Crest Nicholson’s legal completions climbed 35% to 1,091 in the sixth months to …