Piccadilly Circus is London's comparable to New York's Times Square. These are the neon signs viz. LED screens on the northwest side of Piccadilly Circus. As written at the Wikipedia:
"Piccadilly Circus used to be surrounded by illuminated advertising hoardings on buildings, starting in the early 1900s, but only one building now carries them, namely the one in the north-western corner, between Shaftesbury Avenue and Glasshouse Street. The site is unnamed (usually referred to as Monico after the Café Monico which used to be on the site); its addresses are 44/48 Regent Street, 1/6 Sherwood Street, 17/22 Denman Street and 1/17 Shaftesbury Avenue, and has been owned by property investor Land Securities Group since the 1970s.
The earliest signs used incandescent light bulbs, these were replaced with neon lamps, as well as moving signs (there was a large Guinness clock at one time). From December 1998 digital projectors were briefly used for the Coke sign, while the early 2000s have seen a gradual move to LED displays. The number of signs has reduced over the years as the rental costs have increased.
As of 2008, the site has six illuminated advertising screens above three large retail units, facing Piccadilly Circus on the north side, occupied by Boots, and GAP and a mix of smaller retail, restaurant and office premises fronting the other streets. A Burger King located under the Samsung advert which had been previously a Wimpy Bar until the late 1980s had closed in early 2008 and is presently being converted into a Barclays Bank.
Coca-Cola have had a sign at Piccadilly Circus since 1955. The current sign dates from September 2003, when the previous digital projector board and the site formerly occupied by Nescafé was replaced with a state-of-the-art LED video display that curves round with the building. On November 23, 2007 the very first film was broadcast through the board. Paul Atherton's film The Ballet of Change: Piccadilly Circus was allowed five minutes to show the first non-commercial film depicting the history of Piccadilly Circus and the lights.
The former Nescafé advert site had also been occupied by a neon advertisement for Fosters until about 1999 and for three months in 2002 between the display of the Nescafé advert and the enlarged Coca Cola advert this part of Piccadilly Circus had featured the quote "Imagine all the people living life in peace" by the late Beatle John Lennon. This was paid for by his wife Yoko Ono who spent an estimated £150,000 to display an advert at this location.
Sanyo's sign is the oldest out of the six, the current incarnation having been installed in the late 1980s and remaining unchanged ever since. However, earlier Sanyo signs with older logos have occupied that position since at least 1980.
TDK replaced the space formerly occupied by Kodak in 1990. Their sign has remained almost unchanged since, although in 2001 the colour of the background lamps were changed from green to blue, and the words 'Audio & Video Tape' and 'Floppy Disks' under the logo was removed.
McDonald's added a sign in the mid-1980s, replacing one for BASF. In 2001 the sign was changed from neon to an animated LED screen, which was further changed to a bigger, brighter LED screen in 2008.
Samsung replaced a sign for Panasonic in November 1994, and the sign was upgraded from neon to LED in 2005.
Piccadilly Lite was added on 3 December 2007, placed under the Samsung and McDonald's signs. This is an LED screen that allows other companies to advertise for both short and long term leases, increasing the amount of advertising space but using the same screen for multiple brands."