It is a bright sunny day in Sandyford, and Mark Butler is looking forward to a sea swim near his home in the coastal town of Bray, Co Wicklow. The managing partner of HLB Ireland is an expert in strategic business planning and he is used to advising entrepreneurs and businesses in sectors such as food, hotels, leisure, property, and veterinary practices on how to get more from their businesses. But he also loves the outdoors, whether it is swimming, cycling, or running. We are meeting to talk about HLB Ireland, the fast-growing accountancy and financial advisory business that he…