12/13 June 1990
According to the SIO, Henderson’s, statement S4710J, he attended an international
conference in June 90 at which a photo of PT/35(b) and details of it were handed over
to FBI officers.
In his DP Henderson states that he agreed to provide a copy of photograph of the printed circuit board to the American Intelligence Service but stated that he was not prepared to hand over the item. He also provided British Intelligence with a copy of the photograph of the PCB. He does not state when he did this.
He does not mention the international conference. He goes on to state that, some time
later, the Americans came back and suggested the fragment could be part of a “Land”
for a timing device and in brackets in the DP it says the device was similar to one the
Americans had which eventually became K-l.
Further details about the handing over of a photograph of PT/35(b) to the American authorities are addressed in chapter 8 of the statement of reasons.