Hulu worldwide
Yes, the advice provided was US-centric; no idea on availability in the UK.
Others could provide more detail on this, but one possible way of accessing Hulu (assuming it is not available in the UK) would be to use a separate address, so that anywhere in the world it would be read as in the US, and with those permissions.
With such a set-up, one should be able to watch anything online available in the USon one's computer. But of course still with the limitations of ATV, which anyone would experience. Roku would probably work at that point to stream to an HDTV, unless it, too, is communicating with the outside world, and bent out of shape to find itself in a location it does not approve of.
But at minimum, if determined one should be able to access Hulu anywhere, and probably as well on the big screen.