WHAT is it about the Hongkong and Shanghai Bank that makes its senior executives so terrified of publicity? Last week we brought you pictures of chairman John Gray's swimsuit-clad daughter Laetitia taken from a modelling shoot for an English magazine - pictures Mr Gray had refused to allow any Hong Kong magazine to purchase. The Sunday Morning Post then asked Lady Becky Purves, wife of Mr Gray's predecessor Sir William Purves, for an interview. It was a harmless enough request to make of one of the territory's best-known social figures before she and her husband departed these shores for good, at least we thought so. Sir William didn't. He told his wife it would serve no useful purpose for the likes of us to interview her. The Chinese banking community is often criticised for its reluctance to breathe the oxygen of publicity - but they would appear to be paragons of loquaciousness when compared to the Hong Kong and Shanghai.