Attendees heading to Leeds Dock for the “Real Estate Investment and Infrastructure Forum” in May are in for a treat. Infrastructure-lovers arriving in the northern city by train should head down into the bowels of the station, ignoring the whiff of damp from its position on arches above the River Aire. Cut through the quayside new-builds towards a crumbling stone jetty. A tram was supposed to link the dock to the station. It was never built. Leeds remains the biggest city in Europe without a mass-transit system. Instead, the Twee, a bright-yellow second-hand taxi boat from Amsterdam, has to do.