Craig/Justin,
(see this thread for explanation of Craig`s other profile - http://boards.ancestry.co.uk/localities.britisles.england.ln...)

You couldn`t make this up! Oh look you have!

George W Holden was not George William but George Watkins Holden b.1846 (not 1877)
In addition to the link posted by cjeffrey198 a little over year ago, this blog is very informative.
http://photo-sleuth.blogspot.co.uk/2011/10/sepia-saturday-97...

He did not move to Newcastle but...
"...continued to operate his photographic business out of the family home at 55 Tudor Street, Cardiff from 1907 until his death in 1921, aged 75"

Pennoyre House was not demolished in 1974.
Further history of the house here http://www.coflein.gov.uk/pdf/CPG329/
It was converted into apartments in 2005.

Really Craig/Justin, you`re about as qualified a genealogist, as I am as a Brain Surgeon! lol

Jessica