The final live show between 7:30PM and 10PM averaged 8.45 million viewers which very is actually one of the lowest ratings of the whole series, beaten by many of the audition episodes.
2007: 11 million*
2008: 12 million*
2009: 16.3 million*
2010: 12.3 million
2011: 11.7 million*
2012: 11.4 million
2013: 10.6 million
2014: 10.3 million
2015: 11.3 million
2016: 8.5 million
* denotes average over separate performance and results show
http://www.tellymix.co.uk/ratings/26...ched-ever.html