Home Shareholder Information Key Performance Indicators prev next Key Performance Indicators 52 weeksto2 April201052 weeksto1 April201152 weeksto30 March201252 weeksto29 March201352 weeksto28 March2014Revenue growth+2.7%+4.6%-0.8%+1.0%+7.9%Gross margin54.4%55.8%54.8%54.8%53.7%Operating margin13.5%13.9%11.5%8.8%8.3%Underlying Group EBITDA£143.8m£153.2m£123.6m£103.4m£101.1mNet debt(£155.5m)(£103.2m)(139.2m)(£110.6m)(£99.6m)