It was a courtship that began three years ago. Livingbridge, one of Britain’s most active mid-market private equity investors, could see that Chill Insurance was going places. Things, however, did not really become serious until about nine months ago when Chill began to look more seriously for external investment. Co-founded by brothers Padraig and Seamus Lynch in 2006, the insurance and financial services group was growing fast. A third brother, Fergal, is head of marketing with the firm, making it a family affair. Chill had perfected its technology platform after investing €10 million over the last four years. It was adding…