What model year is your car Lee?
VW changed the design of the shifters very slightly for MY08 vehicles, resulting in any short-shifters designed for the VW 6-speed box up until this date to not work properly. Perhaps VWR are unaware of this? The only explanation that I can think of...
It's an 08 Ed30 Chris.
I did raise this with Mark @ VWR and he said it was fine?
It now looks like it isn't :(
I think I'm missing a small plastic cap of of the sideside bracket now too...
Like the little white piece in Matt's pics. I think the Chamfered edges of the channel cause it to pop free.
On the standard shift bracket, the edges are squared, not triangulated.