appearance diesel engine equipment locomotive machinery marshalling-yard mobility motion move moving power rails railway railway-yard restoration restoration-yard strength architecture building college courtyard elements England english flagstones Great Britain London marshalling yard pavement quad stone windows chains crane gears heavy heavy-duty lifting machines repair repair-work repairs trains cable greyscale hook steel-cable cartage check checked checking clean cleaned coated colors colours haulage movement painted powerful silver wheels confined display displayed engines fence fenced-in historical history locked locomotives restored steam-engines steam-locomotives steam-trains transportation classical colonnade grand Greenwich landmark mansion old Old Royal Naval College passageway pillars tourism tourist attraction