https://www.legislation.gov.uk/ukpga/2016/25/schedule/4/enac...
Where a "grade 6" staffer of the Food Standards Agency "(b) may authorise the obtaining or disclosure of data by a person who is not an authorised officer, or any other conduct by such a person, which enables or facilitates the obtaining of the communications data concerned, and (c) may, in particular, require a telecommunications operator who controls or provides a telecommunication system to obtain or disclose data relating to the use of a telecommunications service provided by another telecommunications operator in relation to that system."
Some council authorities already used them to spy on families, to determine whether to extend such things as school placements and tax discounts.
You have to assume RIPA powers are abused as a matter of routine.