We recently rented a holiday flat in a development built on the site of the former Whitehall Shipyard. The photo shows a sign nearby. I was amused by "the swing bridge in the harbour limited the size of vessels capable of passing through it to 57,000 tons", clearly not written by anyone with a knowledge of shipping. I wonder what other errors there are.
The site of the dry dock is the gap between the buildings near the staging on the right bank.