Allianz provides senior debt and Brookfield provides mezzanine for 23-acre complex. : Allianz Real Estate and Brookfield have refinanced the marina office complex in London’s St Katharine Docks owned by Blackstone. In a deal coordinated by HFF Real Estate, Allianz has provided a five-year senior loan on behalf of a number of Allianz Group insurers, and Brookfield has provided mezzanine finance through its Brookfield Real Estate Finance Fund V. It was reported last year that Blackstone was looking to sell the 23-acre St Katharine Docks.