Specialist learning disabilities social care provider CareTech Holdings has announced a 5% increase in revenue from £39.5m to £41.4m in its interim results for the six months ended 31 March 2010.EBITDA also increased 11% to £10.7m versus £9.6m in 2009 and profit before tax increased by 32% to £7.6m. First half operating cash inflow stood…