Theory:Doctor Who television discontinuity and plot holes/Face the Raven

Although it's what's on screen that ultimately counts, the filming script for Face the Raven, released on the BBC Writers Room website on 26 November 2015, indicates several plot points left unclear in the final episode were originally included. They include (among others):
 * The old man (a.k.a. "Chronolock Guy") is not a Cyberman as some have interpreted Ashildr's dialogue to suggest.
 * Ashildr's tattoo does not disappear for Clara's death because, according to the filming script, Ashildr no longer had control over the raven once Clara changed the terms of the deal. Thus the tattoo remains with her throughout.
 * The disposition of Clara's body and the fact Rigsy keeps his memory is the subject of a cut sequence in which the Doctor carries her remains inside and instructs Rigsy to inform her family and Coal Hill School. He also demands that Ashildr not use retcon on Rigsy in order for him to both do this and remember the sacrifice Clara made for him.
 * As indicated, unfilmed references in this script really don't have any bearing on continuity or discontinuity.


 * It is stated that no-one leaves the trap street without having their memory wiped, but Rigsy's mural for Clara shows that he somehow retained his memories.
 * That's their policy, but they of course don't have to enforce it. Ashildr may have chosen not to out of guilt over Clara's death, and/or fear of the Doctor's threatening tone. Alternatively, we don't know what Rigsy did or did not remember. He could have been given a retconned version of events that still allowed him to honour Clara's memory.


 * (Related to the above) How can 'Chronolock Guy' be a Cyberman? He has a strong emotional attachment to the woman who is presumably his wife.

They said the death cannot be avoided, but what if Clara transferred the Chronolock to Ashildr. I mean if you cannot kill an immortal then what happens?