Hornbeam may well be right that the old steam crane, which I think is visible in both photos, was still there when he was.
In fact, I suspect it remained in service until 19 March 1968. How can I be so precise? A large slice of my career within the Personnel Department for TCC/THPA was in investigating and dealing with Employers' Libility accident claims agains the Authority. It was on that date that my photograhic skills were first called into use by my boss. Sadly, there was a serious accident at the Graving Dock and the cranedriver was seriously injured - burnt or scalded - while operating the crane. Memory fades but I think the machine had somehow overturned, rather than exploded. The old crane was certainly a write-off!!
Not only is the date of that accident in my shipping notebook, but I amanaged to end that sad morning by taking the photo of the FRANCIS SAMUELSON and the PRIESTMAN DREDGER NO. 2. See:
viewtopic.php?f=139&t=367Ron M