https://www.theregister.co.uk/2018/03/29/cambridge_analytica_parent_firm_had_routine_access_to_uk_secret_information/

Cambridge Analytica's parent biz had "routine access to UK secret information" as part of training it offered to the UK's psyops group, according to documents released today.

A letter, published as part of a cache handed over to MPs by whisteblower Chris Wylie, details work that Strategic Communications Laboratories (SCL) carried out for the 15 (UK) Psychological Operations Group.