ITV said the programme was the highest rating show of the year so far, nudging ahead of a Coronation Street which pulled in 11.2 million in January.
Adding viewers for ITV's +1 channel brought the audience to 11.9 million for the BGT finale, with a peak audience of 14.5 million.
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The company advised customers to "unplug" their tumble dryers and "do not use it" if they are subject to the recall.
Police have found possible evidence at the the former home of double murderer Christopher Halliwell. It's part of a major search operation.
Wednesday's weather forecast for the west of the region