Discovered a story, appropriately in the Discovery Museum in Newcastle, which had a couple of North-East connections in the story of the ultimate cracking of the Enigma Code at Bletchley Park.
HMS Bulldog built in 1929/30 by Swan Hunter & Whigham Richardson Limited at Wallsend on the River Tyne, was captained by Joe Baker-Cresswell of a Northumberland land-owning family, who became High Sheriff of Northumberland in his later years. Her most notable actions were the capture of a complete Enigma machine and codebooks from the German submarine U-110 in 1941.
No image of "Bulldog" being built but this is a typical image of how closely Shipbuilding and the community lived "cheek by jowl" at Wallsend.

By TWAM - Tyne & Wear Archives & Museums (World Unicorn Uploaded by PDTillman) [No restrictions], via Wikimedia Commons"
World Unicorn, built by Swan Hunter 1973
Regards Neil