We think Dad took this photo in 1951 but cannot be sure. He took a number at that time when visiting the Festival of Britain that was held at the South Bank that year.
Trafalgar Square - early 1990s?
The steps were built around 2003 and are not shown here so that may give a clue. It is also around the time when Dad took photos of St Mary Le Strand and I used car number plates to date those - I assume it was on the same photo trip.
Trafalgar Square - September 2017
Photo taken by me on the morning of Sunday 17th September 2017.