Welcome to the Besso website Besso Insurance Group Limited Besso is an independent management owned Lloyd's Broking group operating in the London Market for over 40 years - and prides itself on providing a dynamic service both to Clients and to Underwriters. Its origins date back to the Besso family in Italy where they have been involved in the insurance business for generations. The company also enjoys a minority shareholding by insurance investment specialist, B P Marsh & Partners Plc.