Housebuilders have reported strong trading updates and results throughout the summer.Barratt said that it expected profit for the year to the end of June 2015 to increase by around 45% on 2014, with completions up 10.8% to 16,447. Taylor Wimpey said that its pre-tax profit during the six months to June 28 2015 had increased 33.4% to £238.0 million against …