LONDON (Reuters) -More than 25 people were taken to hospital on Wednesday after a leak of a high quantity of chlorine gas at the swimming pool used for the London Olympics, emergency services said. The London Fire Brigade said that around 200 people had been evacuated from the Queen Elizabeth Olympic Park’s aquatics centre, after it was called at around 0945 GMT to the east London site, which hosted Summer Olympics events ten years ago. “Due to a chemical reaction a high quantity of chlorine gas was released,” London Fire Brigade said in a statement, asking nearby residents to close their door…