Hello Andy, I know the launch you are on about, I encountered it back in summer 09, http://www.shipsnostalgia.com/gallery/showphoto.php/photo/192823/title/mod-harbour-lauch/cat/all
Can't say with any certanty but would estimate a guess these launches are not one of the same but will take a trip over to Gosport to see if it's still there.
Best wishes
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