It's interesting that the South Atlantic numbers show no Naval presence. That simply illustrates, though, the meaningless nature of such an answer because it relies on a very precisely aimed question. The Navy is in Theatre but will appear on Fleet's head count and not CBFSA's.
The original question, though, asks about
non-military locations. Arguably all HQ locations have and always will have a military element. The key question, perhaps, should be how many Mil staff are on tasks previously performed by Civilians or are otherwise not core Military. For example, many Naval appointments in DE&S are to Posts previously filled by Civilians in DG Ships and DGST(N). Another point to note is on Page 2 of the QLS;
Section -1 civilian personnel total includes Royal Fleet Auxiliary (RFA). RFA civilian personnel cannot be identified by location as the data are not held centrally.
I mention that because some RFA staff are now fulfilling functions previously undertaken by Civil Servants and are destined to take on even more.