Parkside Dundas van?

A small update on the 'praying' post of a couple of days back. The wagon in question was the above. The provenance of which is that I picked it up at a show unbuilt for £1.50. It looked complete but there was no header card and no instructions hence the price. What we have here is a BR van built around 1952 to diagram 1/208 which is a total minefield as that were built all over the place and changed to ply sides from planks halfway though. That much I knew or could look up.
The kit included an unfitted chassis though photos suggest that it should be a fitted version. The one good photo I found backs this up. While in Cornwall I built up the bits that were included and on return have added rain strips, tie bars vac cylinder/pipes and cross rod from Ratio bits and strip.
The question is this. I assumed that it was an early Parkside kit, but in the back of my mind I had it that they bought some Ian Kirk kit moulds and this used classic Parkside plastic, but it is a bit more rounded than their usual quality. Not that it really matters much - just curious. 

I'd part painted it beforehand using my usual German grey and dried turd mix for the roof and underside, and G**s Workshop morfang for the body, which is a fair match for newish stock brown. I just need to source some transfers and dirty it slightly.