There is a little issue, it may /may not have surfaced before, if it was jeremy he should have cut all the phone lines or made them unuseable , blamed sheila for it, gone home travelled as normal to work and take it from there, jeremy was no qualified doctor he could not confirm any death, one hell of a gamble, the victims could have had tiny traces of life still, but not enough strength to get upright and open doors but could get to a phone just. Sheila heard voices that the world was wrong and had to be put right, what had to be put right.