Here's an interesting photo of the open-air car park beside Derry's Clock in about 1971 (please click on the picture to enlarge it). It's interesting to see all the old cars (all would now be classics) including Ford Prefects and Escorts, Morris Minors, Austin 1100s, Minis and many more.
It's interesting that the wrought iron entrance to the old underground toilets (or pissoirs as they were originally called) still survive in the photo even though they were bombed in the Blitz.
On the left can be seen Derry's Clock and, on the right, is the brick building housing the popular picture house, the ABC. The concrete wall in the middle of the photo was where the queues would form for the cinema when ever a popular film was on. The queue would stretch right back and around the corner. When I was a boy, I remember joining these queues several times to watch Roger Moore in Live and Let Die, Gary Glitter in Remember Me This Way and Clint Eastwood in Every Which Way Was Loose. Most were great films apart from the Gary Glitter one which was awful and my visit to see it is mentioned in my book, A 1970s Childhood.
Of course, the area today is under the Theatre Royal and its adjacent car park although it doesn't seem too long, to me, that it was all just like this. The older you get, the nearer the past seems!