A sign above the cinema entrace states that, at the time of the photo, it was "closed for modification & redecoration".
The Rex closed in 1959, and is now a Tesco supermarket.2
Next to the cinema are (from right to left) Martin's (newsagents), City & Suburban Estate Agents, and J. B. Motors (notice the cars inside the building).
1 Reproduced by kind permission of
Cranley Commercial Calendars.
2 Romford Recorder, August 13, 1999, page 4.