I think the site aims to list aircraft that have formerly served with the U.K
armed forces – hence the Malaysian Twin Pioneers wouldn’t feature as I believe they were sold direct from Scottish Aviation.
With any site that aims to list wrecks and display airframes there will always be problems – of course it makes it perfectly clear on the site that they will always accept amendments which is what makes it vibrant.

A very good effort which provokes people like me to continue serching!