Pathology provider The Doctors Laboratory (TDL) reported a 12% increase in turnover to £78.9m for the year ended 30 June 2015.Cost of sales increased 9% to £56.6m while administrative expenses almost trebled to £10.6m, leaving operating profit of £15m against £17.5m in 2014, including £1.3m profit share from the company’s interest in two LLPs. In…