I'm afraid it's contained within Julie's statement that she wondered out loud about the slaughter of Sheila,Nicholas and Daniel,whilst seemingly Nevill and June were written off. Might Jeremy have been thinking how Julie would respond to the massacre alongside cousin Ann,whom he would henceforth have to cooperate in the caravan park business,he already having made one attempt to keep the latter onside by the purchase and sending of a card on the occasion of her latest birthday.