Shares in infrastructure services company Cardno Limited soared after private equity group Crescent Capital Investments sweetened a takeover offer. Cardno, originally an engineering practice started in Brisbane, has been hit by the downturn in resources project investment. Today Crescent improved its cash offer by 9.5% to $3.45 a share for one out of every two shares it does not own. Part of the improved bid means that Crescent will take board control once it secures 30% of the company. Cardno chairman John Marlay said: “We continue to believe that Cardno is a great business with strong...