Greece repaid the European Central Bank on Monday, the bank said, clearing a key obligation worth about 4.2 billion euros (£2.9 billion) with one of its top lenders, after receiving temporary funding while it negotiates a bigger bailout deal. The 3.5 billion-euro bond and 700 million-euro interest payment to the ECB was crucial. It also comes after Greece repaid about 2 billion euros to the International Monetary Fund, clearing all its arrears after missing several payments in June and July.