The coal-fired twin-screw steam tug, Portwey. Built in 1927, she's almost unique, very original and bleedin' interesting. In this episode, there's a history of Portwey, a description, and directions to make getting to her location in Canary Wharf easy (believe me, they help). History touched on in this episode: the 1944 disaster of Operation Tiger on Slapton Sands in Devon, the redevelopment of Canary Wharf in East London, and the Harland & Wolff shipyard in North Woolwich.