The UK TV channels in questions are BBC One, ITV1, BBC Two, Sky One, ChanneI 4, 5, ITV2 and E4. BBC One - EastEnders Christmas 1986 episode, 25 December 1986 (30.15 million) ITV1 - Coronation Street Christmas 1987 episode, 25 December 1987 (26.65 million) BBC Two - 1985 World Snooker Championship final, 28 April 1985 (18.5 million) Channel 4 - A Woman of Substance finale, 4 January 1985 (13.85 million) 5 - The Drowning premiere, 1 February 2021 (6.10 million) ITV2 - Love Island series 5 premiere, 3 June 2019 (5.9 million) Sky One - Friends: The Reunion , 27 May 2021 (5.3 million) E4 - The Inbetweeners episode "Home Alone", 11 October 2010 (3.72 million)