Many thanks for posting the video link Dave.

I wasn't doubting your word.

I was questioning whether there is any evidence to support the claim that Edward VII purchased 27 tiaras.

So, the video does say that Edward VII purchased 27 tiaras.

But where is the evidence to support that statement?

I find it interesting that a photo of the Halo tiara was used.

That tiara was not purchased until 1936.