Hi,
There might be a report filed in one of the WO208 or WO344 series. There is an card index to some of those in the National Archives, however, some of the latter series Liberation reports are as yet not fully indexed and so you may have to wade through quite a lot of files to find anything and that can take hours!!
It may well be worth while trying the National Archives of Australia as there might be a debriefing report held by them if they were taken to Australia.
Sorry to be a bit vague, but generally I have looked at European escapers/evaders/liberated servicemen and am not sure whether Far East ones are held in a different series. Brian may well be able to answer this one as he has looked at a lot more files than I have!!
Alternatively you could try searching PROCAT, the report, if there is one, should be in the WO series of files, or e mail the NA and see if anyone can point you in the right direction. You may well find something but not all the reports have survived intact with all their appendices and so you may only get minimal info.
Hope that helps a little bit.
All the best,
Ann