If people want ease of access the records must all be housed in one location which rules out Register House.
It depend what you mean by 'easy access'.
I entirely concur that it is desirable to have all the records stored under one roof, but that's not the most important thing. The most important thing is that access to the records should be provided in a place that is easy for
customers to get to.
At the moment I can have any document I like brought to me in a convenient city centre location which happens to be in an inspiring and historic building. In the same building I can also access a huge range of digitised information that doesn't involve physical storage on the spot. That is what I call 'easy access'.
Thomas Thomson House, being far more difficult for
customers to get to, can never offer 'easy access', no matter what systems are introduced for handling the material.