"About the TDA" is unclear which TDA it's describing
I think it would be helpful if the "About the TDA" were clearer about the relationship between the Technical Design Authority and the Technology Design Authority, and which of them it means when it uses the initialism "TDA".
At the moment, the "Who" section of that page promises to one day explain the membership of the "Technology Design Authority". The "What" section describes the role of the "TDA", and the "Terms of reference" describes the terms of reference of the "Technical Design Authority".
Other pages on the site explicitly expand "TDA" to "Technical Design Authority", so I would guess that's what's meant here, but it would be good to make that clear. And for inattentive readers who might otherwise miss the switch in subjects, maybe an explicit discussion of the relationship between the bodies would be helpful.