Archipelago Risk Services Limited was co-founded by UK broking entrepreneurs Angus Simpson and Richard Coleman LONDON--(BUSINESS WIRE)--Arch Insurance International today announced its investment in Archipelago Risk Services Limited (Archipelago), a personal lines managing general agency backed with underwriting capacity from Arch Insurance (UK) Limited (formerly Arch Insurance Company (Europe) Limited). Archipelago, which will underwrite only intermediated business, leverages a new business model…