Eurostar services between the UK and the EU have been restored following a chaotic day of delays and cancellations, with dozens of TGV high-speed trains in northern France also affected. The major disruption was caused by the theft of more than 600 metres of railway cable near the city of Lille. Plus, the World Economic Forum dubbed the "Summer Davos" is underway in China, with trade tensions and conflicts casting a huge shadow over the event.