Well, I had a classic BT Vision experience this morning.
Put the TV on and pressed the "TV Listings" button to find everything said 'loading'. Checked my internet connection and everything was working OK.
Went back to the channel and the image on screen just stalled, i.e. a static image. Tried using the remote but no response. Tried pressing a button on the box itself, no response. Tried turning off, no response.
Switched off everything at the mains. The power light on the v-box sits flashing and the screen stays black - not even a power up message, no error message, nothing. Waited 30 minutes, but still no change.
This typifies my experience of BT vision.
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Life does not cease to be funny when someone dies, any more than it becomes happy when someone laughs.