the start of the two minutes' silence. The chimes of Big Ben have also been used at the state funerals of monarchs on four occasions, chiming one stroke for each year of the monarch's life: firstly, at the funeral of King Edward VII in 1910, when Big Ben chimed 68 times; secondly, at the funeral of King George V in 1936 (70 strokes); thirdly, at the funeral of King George VI in 1952 (56 strokes); and lastly, at the funeral of Queen Elizabeth II in 2022 (96 strokes). Londoners who live an appropriate distance from the tower and Big Ben can, by means of listening to the chimes both live and on analogue radio, hear the bell strike thirteen times. This is possible because the electronically transmitted chimes arrive virtually instantaneously, while the "live" sound is delayed travelling through the air since the speed of sound is relatively slow. ITN's News at Ten opening sequence formerly featured an image of the tower with the sound of Big Ben's chimes punctuating the announcement of the news headlines of the day. The Big Ben chimes (known within ITN as "The Bongs") continue to be used during the headlines and all ITV News bulletins use a graphic based on the Westminster clock dial. Big Ben can also be heard striking the hour before some news bulletins on BBC Radio 4 (6 p.m. and midnight, plus 10 p.m. on Sundays) and the BBC World Service, a practice that began on 31 December 1923. The sound of the chimes is sent live from a microphone permanently installed in the tower and connected by line to Broadcasting House. At the close of the polls for the 2010 general election the results of the national exit poll were projected onto the south side of the tower. On 27 July 2012, starting at 8:12 a.m, Big Ben chimed 30 times, to welcome the Games of the 30th Olympiad, which officially began that day, to London. 2017 renovation On 21 August 2017, Big Ben's chimes were silenced for four years to allow essential restoration work to be carried out on the tower. The decision to silence the bells was made to protect the hearing of the workers on the tower, and drew much criticism from senior MPs and Prime Minister Theresa May. The striking and tolling of the bells for important occasions, such as New Year's Eve and Remembrance