Industrialist and renowned chartered accountant R S Lodha (66) on Friday died of heart attack in London."My father probably died of heart attack but we will get to know after the postmortem," Harsh Lodha said over phone.Lodha is survived by two sons- Harsh and Aditya- and a daughter Meenakshi. He was embroiled in a bitter legal battle with Birla clan after the widow of M P Birla, Priyamvada, bequeathed about Rs 5,000 crore empire to him.Lodha took charge as Chairman of Birla Corporation, an issue that was challenged legally by B K Birla on behalf of the entire Birla clan, including Kumar Mangalam Birla.Family sources said Lodha died on Friday morning.Lodha, the owner of chartered accountant firm R S Lodha and Company, was responsible for bringing the sixth largest accounting and consultancy firm BDO International to India, tax lawyer S C Vaish said, adding ‘he enjoyed a good reputation’.He had also served as the president of apex industry chamber FICCI.