My understanding regarding the digital phone found amongst some magazines in the corner of the kitchen, is that when Jeremy spoke to the house cleaner, and told her that it was "one of ours", that he was referring to it as being a replacement which had recently been given to the Bambers due to the original one being damaged in an earlier lightening strike (I think in July 1985). Jeremy told me, that the digital phone being spoken about, was not the original phone, but a replacement one...
During discussions with him, I gathered that the replacement phone usually fitted in the main kitchen, had been unplugged a day or so before the shootings occurred, as a result of another lightening strike which damaged Ralphs portable phone, which was duly collected by a GPO engineer, without being replaced. From what I could gather, or at least my understanding of the situation, is that the replacement digital phone was unplugged from the kitchen socket merely as a precaution, and put to one side, whilst Ralph / June brought the round finger dial phone downstairs from the bedroom and it was plugged into the kitchen socket.