Hi Cashflo.
I am a little confused re Bullion vault.
I trade gold with bullionvault and the gold you buy through them is Allocated gold, which is legally your property regardsless of what happens to bullion vault.
If you wanted to take physical ownership you could do that.
But when you come to sell your Gold, you would have to pay to have it assayed incase it had been tampered with, the chain would have been broken.
If you plough through all the Q&A on Bullion vault your fears would be answered.
If you click on Audit on the Bullionvault site you can see who owns all the gold traded on the site.Then click on the different vaults you will see the gold bars that are held in each vault.
Regards.