Not really looking to reopen a can of worms, but the Middle Wallop net looks a plausible pattern. Zooming in to the photo the strips do appear to be hessian but as I don't have a ref for IR reflective tape, perhaps this is painted hessian too?
What I would point out is the museum nets' scrims appear to be folded and possibly glued in place, whereas on genuine WWI/WWII nets the scrims were tied with twine to the nets, called "garnishing", or latterly stitched or stapled (Drawing No 98240 "Method of Scrimming Nets" Public Record Office). The scrim strips were dyed appropriate tones of green and brown to match the theatre of operations. Guy Hartcup's book mentioned in my earlier post gives an excellent grounding in the subject.
From a modelling stand point, making up a 4'x4' scale net would be a serious knitting project...
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regards
Fabrice