I called CIC and the agent told me that it was in SS..
oh, meaning the call agent specifically mentioned "security screening"....
Well, regarding London visa office, I ran into the forum called
"IRCC Official Response to Backlogs in London Visa Office and Answer to Security Screening" and found the following answer;
Q.6 Do every application go through Security Screening?
Answer: As part of routine application processing, all applicants undergo criminal and security screening. IRCC works with its partners, such as the Canada Border Services Agency (CBSA), to ensure that those individuals who are considered security risks are not allowed to enter or remain in Canada.
It is confusing really to figure out though...
Best of luck!