BMI Healthcare said in its interim results that it had increased NHS 9.5% for the six months ended 31 March 2013 compared to the same period last year.Revenue and EBITDAR also grew to £430m (2012: £427.9) and £108.1m (2012 £98.9m) respectively whilst the EBITDAR margin increased from 23.1% in 2012 to 25.1%, putting BMI almost…