Jean-Claude Juncker expressed his regret over Britain's departure from EU (File)

European Commission President Jean-Claude Juncker said Tuesday the EU had done "all in our power" to ensure an orderly Brexit, but said the bloc would await British parliamentary approval for a new divorce deal before ratifying it.

Expressing regret that Britain planned to leave the EU on October 31, Juncker said: "At least we can look ourselves in the eyes and say that we have done all in our power to make sure that this departure is orderly."

"We need now to watch events in Westminster very closely. It's not possible, not imaginable that this parliament will ratify the agreement before Westminster will have ratified the agreement," he told the European Parliament in Strasbourg.