Here's an interesting BBC trail, attempting to explain that digital television doesn't automatically equal subscription television. Even though I think it was possible to buy an ONdigital box at full price without a subscription I don't think many chose to do so.
A few years after that, and at the *very* end of ITV Digital's life the first non-ONdigital DTT box was launched: http://www.digitalspy.com/tech/terrestrial/news/a7187/affordable-digital-tv-the-pace-dtva/
There were a handful of "integrated" digital TVs available before this which often came bundled with a 6/12 month ONdigital subscription, does anyone know if these early digital TVs used the same interface as the ONdigital boxes? And if not, do they/would they still work today? (I believe all the ONdigital boxes died at DSO.)