I think that Governing Bodies and schools should look at introducing policies and procedures specifically for providing safe spaces, the identification of and procedures for handling occurrences of domestic abuse that affect staff, who may feel there isn't anywhere to turn that wouldn't lose them their job, home and entire livelihood if they disclose anything.
It is a national minimum standard in boarding schools for anybody aged over 16 that lives on site to have an enhanced DBS check, not that this prevents those who are 'better' at ensuring their victims do not report abuse.
'19.2 For all members of staff households who are aged 16 and over (not on the roll
of, nor employed by, the school) and who live on the same premises as boarders, an
Enhanced certificate with a check of the Children’s Barred List must be obtained from
the Disclosure and Barring Service (DBS). For all other persons aged 16 and over,
not on the roll of, nor employed by the school, who live on the same premises as
boarders, an Enhanced certificate with a check of the Children’s Barred List must be
obtained. The same premises would include, for example, an abbey or teacher
housing on the same grounds as the school, requiring the use of the same entry and
exit points.
19.3 There is a written agreement between the school and any person aged 16 and
over not employed by the school but living in the same premises as children (for
example, members of staff households). This specifies the terms of their
accommodation, guidance and expectations on contact with pupils, their
responsibilities to supervise their visitors, and notice that accommodation may cease
to be provided if there is evidence that they are unsuitable to have regular contact
with children. They must be required to notify an unrelated designated senior
member of staff if they are charged with, or convicted of, any offence'
- but even those requirements are useless if the abuser has convinced the staff member that it'll cost them their livelihood or that nobody will ever believe them - or when the police have attended, they've failed to see or act on the signs.