...oh I remember now...it was all about OSPS ....'operational selection policies' and what that means, to the ill cult....go figure:

http://www.nationalarchives.gov.uk/information-management/manage-information/selection-and-transfer/selecting-records/osp-number/

....and it's number 57...scarlett's police's number....see url below:

http://www.nationalarchives.gov.uk/documents/information-management/osp-57.pdf

...and it's all about 'nuclear' - go figure: