(1) Whether she has been informed of any incidents in which the master keys of a prison have been reported missing due to (a) negligence or (b) theft; if so, (i) how many such incidents have occurred and (ii) what (aa) are the names of the prisons where these incidents occurred and (bb) has been done to ensure that there are no further incidents of this nature; (2) whether, in respect of each instance where such keys have gone missing, there has been a resulting incident with regard to attempted escapes; if not, what is the position in this regard; if so, what are the relevant details in each case ?