A millionaire banker has been beaten to death after intervening to save a couple being assaulted by a mob. Frank McGarahan, 45, was out with relatives the night before his niece's christening when he saw the pair being attacked near a taxi rank. But as he shouted at the gang of ten men to stop, they turned on him. In the fracas, he suffered a serious head injury. The father-of-two was the chief operating officer of Barclays Wealth, the bespoke finance arm which caters for the bank's richest customers, and managed their combined assets of £133 billion.On Saturday evening the...