However, the article also goes on to say that "the first fully automatic electric traffic lights were at Piccadilly Circus in 1937", which isn't true. The first were in Princes Square, Wolverhampton in 1927, with a second set in Leeds in 1928.
On this day 100 years ago (1926): the UK's first 3-colour traffic lights were unveiled with an experiment at a remodelled Piccadilly Circus