A British academic historian, Hazel Cameron has published a 20 pg article in the journal 'The International History Review' (behind an expensive pay wall):http://www.tandfonline.com/doi/full/...2.2017.1309561

So I rely on this article by an independent Zimbabwean e-paper (not based in Zimbabwe IRRC) and sub-titled:
President Robert Mugabe not only got military support, but was actively aided by the British government to conceal to the world Gukurahundi atrocities soon after the country’s independence, a new report has revealed.

(Later) declassified information from United States diplomatic cables from that era is now providing new information on Gukurahundi.
Link:https://www.thestandard.co.zw/2017/0...rets-revealed/

Dr Stuart Doran cited in the first post has commented too:https://www.dailymaverick.co.za/arti...res-of-1983-4/

There is a useful Wiki on Gukurahundi too:https://en.wikipedia.org/wiki/Gukurahundi