For practical reasons, and to add more to the diorama, a smaller scale will need to be considered.

I will need to add a railway line. So the scale will then be forced to fit a known model ralwat guage. N gauge seems most likely, a scale of 1:148. This scale would halve the original plan dimensions. Already have 1:144 scale figurines to suit. Talking about suits, The POWs only had a loincloth, made from their uniforms. I can see myself spending hours with an X-acto Knife, trimming the suits and body fat off these tiny figurines.

HELP NEEDED
Dear friends and fellow modelers.
Does anybody have any N gauge track they no longer want? I don't care how tattered it is. It's not for running a train on. If so, send me a message.
I need at least 1200 mm (48") of straight, and 600 mm (24") of flexible track.

Thanks for considering this request.

UPDATE: (28/09/2018) No longer need rail tracks. Will make my own. Scale is different to guage. measurements.

Peter, that is attention to detail above and beyond the duty of regular mortals such as I. You are such a boon to this group, bringing artistry and gravitas galore. And an iconic subject to boot. Ooooooooh, submarines...(I really need to do something about my attention span).

Peter, my friend from Down-Under; your skills are amazing and your sense of history is superb. Anyone who sees this replica of the movie bridge should be reminded of the pain and suffering suffered by the POWs, but the young visitors may miss it. Then it becomes the parent's job to "set them straight" so to speak. A few might ...

Personally, I like your idea about a "what if" humourous diorama but that doesn't belong in a museum that way.

Quite a project, mate!

Even better, Peter. A wonderful endowment.

I think that kind of humour would be perfectly acceptable, Peter @tecko.

Whatever you decide to do will be in good taste I'm sure and will be done VERY well with much care and great talent!

Discovered that the movie bridge is also known as Kitulgala Bridge. Named after a town in Ceylon. Kelani River, near Kitulgala, was used for the movie bridge.
https://en.wikipedia.org/wiki/Kitulgala
Extract:
'The Academy Award-winning The Bridge on the River Kwai was filmed on the Kelani River near Kitulgala, although nothing remains now except the concrete foundations for the bridge (and, supposedly, the submerged train cars that plunged into the river in the climactic scene)'.

Guess what, Sri Lanka is rebuilding the Bridge On The River Kwai.
https://www.dailymail.co.uk/travel/travel_news/article-2738001/Sri-Lanka-rebuild-iconic-Bridge-On-The-River-Kwai-starred-Oscar-winning-time-won-t-blown-up.html

Thanks for the article, was a great read, despite being in the daily mail...

I wholeheartedly agree with your scratchbuilding policy, Peter. Your skills (as demonstrated by your reckoning of the Bridge’s length) are in excess of what any manufacturer could produce; and no, that is not flattery my friend.

This build (44 posts before ground is even broken) is already a cornerstone of this group build, a reference point, or a staging post if you like, for ideas and imagination. Thank you.