Healthcare Locums (HCL) has released a worrying set of interim results for the six months ended 30 June 2010. The company recorded revenue of £76.4m, down from £85.6m in the same period last year, and adjusted EBITDA of £9.6m, also down form £11m. In a further blow, operating profit stood at £7.6m (2009: £9.5m) and…