 
 Height was perfect for 100mm wood with 12mm ply on top
It's bolted firm to the van except for the removeable box for access to the engine which is a snug fit and kept in place by the tailgate when closed.
If I can do it anyone can.
Thanks to B&Q for cutting the wood for me with their 15 free cuts (angled cut at the carpet lined side was done at work on the bandsaw)
 
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				 I'm yonks off doing that bit but it seems easy enough.
  I'm yonks off doing that bit but it seems easy enough.