and supposedly a variation, attributed to William Crotch, based on violin phrases from the air "I know that my Redeemer liveth" in Handel's Messiah. The notional words of the chime, again derived from Great St Mary's and in turn an allusion to Psalm 37:23–24, are: "All through this hour/Lord be my guide/And by Thy power/No foot shall slide". They are written on a plaque on the wall of the clock room. One of the requirements for the clock was that the first stroke of the hour bell should be correct to within one second per day. The tolerance is with reference to Greenwich Mean Time (BST in summer). So, at twelve o'clock, for example, it is the first of the twelve hour-bell strikes that signifies the hour (the New Year on New Year's Eve at midnight). The time signalled by the last of the "six pips" (UTC) may be fractionally different. On 13 November 2022, Remembrance Sunday, the chimes of Big Ben returned to regular service for the first time since August 2017, preceding the hour bell being sounded at 11:00 a.m. local time, the first hour strike marking the beginning of two minutes of silence. Cultural significance The clock has become a cultural symbol of the United Kingdom, particularly in the visual media. When a television or film-maker wishes to indicate a generic location in the country, a popular way to do so is to show an image of the tower, often with a red double-decker bus or black cab in the foreground. In 2008, a survey of 2,000 people found that the tower was the most popular landmark in the United Kingdom. It has also been named as the most iconic film location in London. The sound of the clock chiming has also been used this way in audio media; the Westminster Quarters are imitated by other clocks and other devices, but the sound of Big Ben is preferred as the original and best. Big Ben is a focal point of New Year celebrations in the United Kingdom, with radio and television stations airing its chimes to welcome the start of the New Year. To welcome in 2012, the clock tower was lit with fireworks that exploded at every toll of Big Ben. Similarly, on Remembrance Day, the chimes of Big Ben are broadcast to mark the 11th hour of the 11th day of the 11th month and