Galliford Try has produced a “record” half year profit, with housebuilding arm Linden Homes making good progress on margins, outlets and sales. During the six months to December 31 2015, Linden’s operating margin rose to 17% from the 15.1% reached over the equivalent period the previous year. Linden’s revenue was up 5% to £362.7 million, driven by 1,357 unit completions …