The European Central Bank (ECB) will move gradually to increase its key lending rates, the head of the French central bank told Bloomberg TV on Tuesday in an interview recorded at the World Economic Forum (WEF) in Davos. A rise of 0.5 percentage points did not enjoy a consensus on the ECB’s governing council, Bank of France Governor Francois Villeroy de Gallhau said, suggesting that any rise would be of the order of 0.25 percentage points. On Monday, ECB president Christine Lagarde raised the prospect of the first rate increase in the eurozone in 11 years and signalled an end to negative rates…