Siege Guardsmen Surrender - Glasgow Herald, 2 Nov 1983
Libyans Detain Three More Britons Glasgow Herald, 25 May 1984
The story of the two Guardsmen getting four and three years in jail respectively appears at the end of the story about Libyan authorities detaining three Britons.
There is a Masters thesis from HK University which looks briefly at the case in the context of race and sentencing in HK; it appears that the judge thought that the Crown's throwing of the book at the defendants was excessive as this was clearly a case of drink-fuelled stupidity. The prosecutor reported that he felt that the sentence should've been at least six years.The (HK) DPP agreed and was in favour of an appeal against the sentence length. It appears that the DPP eventually concluded that there was little prospect of success, and the process of appealing to increase the sentence was dropped (See Edward KN Lau,
The influence of race on sentencing in Hong Kong, University of Hong Kong, 1990, pp.64-66)