John Clohisey is the type of businessman who mostly goes under the radar. But the accountant and BWG executive has been a giant of Irish convenience shopping for the past 30 years. Spar, Eurospar, Mace, XL, and Londis are all in the BWG stable of more than 1,000 Irish stores. After building up an empire, the kings of ready retail have enjoyed a bumper few years as profits at BWG soared and executive pay breached the million-euro mark. Hangover debts from the Celtic Tiger era were put to bed when The Spar Group (TSG), listed on the stock exchange in…