That’s why I referred to it as “alleged”.
Wasn't it proven by an expert witness that there was a call made from WHF to J. Bamber's cottage? If Jeremy faked the call from WHF there still needed someone at the cottage to answer the call.
"27. At 3.35 a.m., Mr Bonnet arranged for a police car to go to White House Farm. A check
made by a British Telecom operator of the telephone line to the farm was made at 4.30 a.m.
The receiver was off the hook and all the operator could hear was the sound of a dog
barking. "
and
"68. There was no evidence of telephone billing information of the sort which would be available
these days. There was, however, expert evidence called as to the effect of a telephone call
having been made from White House Farm to Goldhanger which was then abandoned by the
caller with the receiver being left off the cradle, as claimed by the appellant. If such a
sequence had occurred, the telephone link would have remained open either until the
handset at White House Farm was replaced or until the handset at Goldhanger had been
replaced and left in position for a period which could vary from 1 to 2 minutes, when an
automatic interruption of the link would take place. Until one or other of these events, the
appellant would have been unable to make any call from the Goldhanger telephone. "
https://murderpedia.org/male.B/images/bamber_jeremy/20011745.pdf