After the Ever Given blocked the Suez Canal last month, we ask: are container ships too big? How much bigger can they get? To answer those questions we speak to Aslak Ross, head of marine standards at the world’s largest container shipping line, Maersk. Jan Hoffman, head of trade and logistics at the UN's Conference on Trade and Development, explains that economies of scale have led to the ships getting bigger and bigger. And Evert Lataire, head of maritime technology at Ghent University, describes how he assesses whether a mega ship can fit into a port, or through a canal.

Picture: the Ever Given container ship lodged sideways in the Panama Canal. Credit: Getty Images.)