Yes you can but on the mobile device you can only watch those channels with a wifi symbol.
If you try to watch one without the symbol, you get the behaviour you are seeing.
Thanks for your post and apologies to hear that you've not been able to watch a programme you wanted via TV Anywhere.
As mentioned by Ernie_C, there are only certain channels that you can watch via TV Anywhere. These are shown by the little wifi symbol to the left of the channel logo.
When selecting channel 4, what comes up?
Come back and let us know how you get on.
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