Aon has made two senior appointments to its UK private client division, with Nick Gavin-Powell becoming head of private clients, while James McDowell takes up the role of head of fine art. Mr Gavin-Powell joins from seven years at Howden Group, a specialist insurance broker, where he was most recently divisional director for its private office. Mr McDowell joins Aon from 16 years with AXA Art Insurance, where he was a senior fine art underwriter. He specialises in the in...