Developing Fast': Britain Facing...
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No best answer has yet been selected by loubagnall. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.Yep, basically that's it. You buy a Freeview box, plug it in & then you get the few extra digital channels for no additional charges. You'll need to check whether your Mum is in an area that can recieve the channels first. You can do that (as well as get more useful info) here http://www.freeview.co.uk/
As has been previously mentioned - the most important issue is the existing aerial quality. The Freeview channels are broadcast on different frequencies to the regular analogue channels. In some areas they are very close to the frequencies used for analogue - I.e. your regular BBC1/2, ITV, C4 and Five so you can get away with the aerial you already have. In some area, to avoid interference, the Freeview channels have to be broadcast on frequencies which are out of the normal range of a standard aerial.
If you give an idea of the area concerned I can look at the transmitter details and give you some more info.