At 6.09 a.m. on the morning of 7th. August 1985, Jean Rowe, a BT operator, transfers the open line at the farmhouse to Essex Police HQ for monitoring. The Campaign Team allege that at this one and the same time, a 999 call is made on that line.
Two calls can't be made from one phone at one time, so the claim does not make sense.
Is Jeremy saying that as the open line was transferred:
(i). Sheila terminates the open line and makes a call?
(ii). Sheila speaks into the open line (perhaps after hearing voices emanating from the handset)?
(iii). Something else?
EDIT: This issue is now addressed in a General Discussion thread:
https://jeremybamberdiscussionforum.com/index.php?topic=280.0