Dropping here in case it's important and gets 'lost' in qresearch.

Possibly same Jason Fleming GCHQ Chief, supposedly joined from Private Sector.

Possible Jason Fleming Connection Jan 1993 - ECMM Bosnia

'''AGREEMENT ON AN URGENT CEASE-FlRE

BEIWEEN THE HVO AND BH ARMY IN

CENTRAL BOSNIA'''

Signed by a Jason Fleming - ECMM, ZENICA

European Community Monitor Mission

It's listed in the Peace Agreements Database:

https://www.peaceagreements.org/view/1618

https://www.peaceagreements.org/masterdocument/1618

Some connection to a Colonel Dario Kordic, HVO.

https://books.google.com/books?id=NlRD4yaHrEYC&pg=PA370&lpg=PA370&dq=jeremy+fleming+ecmm&source=bl&ots=-Ql9RB-8ID&sig=ACfU3U2a335--cNyrXp8_PwTOidzjqf9Dw&hl=en&ppis=_c&sa=X&ved=2ahUKEwjmu8eq2bzmAhVGCc0KHXhmD6UQ6AEwE3oECAkQAQ#v=onepage&q=jeremy%20fleming%20ecmm&f=false

Jason Fleming mentioned in the book:

'The Muslim-Croat Civil War in Bosnia: A Military History, 1992-1994

https://books.google.com/books?id=OTQs4zif-qYC&pg=PA79&lpg=PA79&dq=jeremy+fleming+before+1993&source=bl&ots=-uBk2xEGyn&sig=ACfU3U0HGthFwjtvcFyCxsaGjHa0csyOUA&hl=en&ppis=_c&sa=X&ved=2ahUKEwjYuYib0bzmAhVSU98KHX-sD5A4ChDoATABegQICRAB#v=onepage&q=jeremy%20fleming%20before%201993&f=false