Florence Nightingale Hospitals Ltd, the mental health hospital in central London, had a steady year to end 31 December 2012. Turnover was up slightly to £11.6m (2011: £11.1m). Cost of sales were up also to £8.0m (2011: £7.9m) as were administrative expenses to £2.9m (2011: £2.9m) which after interest received of £17,000 (2011: £4,333) left…