The Olympic Games contributed to high audiences for the BBC and also resulted in ITV having a lower than usual share. Channel 4 continued to have a good share of audience after a slump last year.
The report also reveals that the non-terrestrial channels continue to be favoured by young audiences and that the terrestrial channels hold a larger share of viewing on the Freeview DTT platform.
Lynne Robinson, the IPA's research director, said: "The latest quarter's figures demonstrates the growing strength of digital television both in terms of penetration and its positive effects on overall viewing levels."
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