Complex sentence: Three days later, members of Bamber's extended family visited the farm with Basil Cock, the estate's executor, and during that visit, one of his cousins, David Boutflour, found the silencer and the sights in the cupboard.
Split into simpler sentences: Three days later, members of Bamber's extended family visited the farm with Basil Cock, the estate's executor. During that visit one of Bamber's cousins, David Boutflour, found the silencer and the sights in the cupboard.