I don't have a TV module, but I see no reason that a standard digital tuner wouldn't work and you could hook it up to the video inputs... but as I understand it, the digital signals in the US are such that they do not work very well while in motion, you would likely only get good reception while you were not moving... as you appear to be in the UK, you may have better luck, there are some 3rd party vendors which supply plug and play solutions.
I have also seen some nice mobile satellite setups but you'd need a rather ugly antenna for that.