MUNICH, Feb 18 (Reuters) - Britain stands ready to support any country that was willing to send fighter jets to Ukraine right now, Prime Minister Rishi Sunak said on Saturday, as he urged allies to maintain their support in the war against Russia. It has so far refused to send fighter jets, saying the lengthy time needed to train pilots and substantial support crews required meant they would be of little immediate use, but Sunak told the annual Munich Security Conference on Saturday that Britain could help in other ways. See here for a complete list of exchanges and delays