From left to right is: SSBrighton, opened 1934 as a swimming pool, converted to an ice rink the following year and closed in 1965; and, immediately before St. Pauls church, the Odeon cinema, opened in 1937 and closed in 1973.
The Odeon has been moved to Kingswest on the corner of West St./Kings Road, (out of the photo) and a large yellow-brick office building now occupies its site, opened 1992. It is strange that a street close to the seafront and given over largely to the entertainment industry was thought an appropriate location for offices. The SSBrighton was replaced in the 1990's by the new Russell Road and the Oak Hotel, now a Travelodge. Beyond St. Pauls the buildings are largely unchanged but in the distance are now over-topped by Queen Square House. There is still a bus stop in West Street but it is only served, from Thursday to Sunday, by late "Nightclubber" buses.
The most noticeable change over the 50-60 years between the two photos is the ugly increase in street clutter, most of which serves no useful purpose whatsoever.
See also: West Street; then & now.