Five years ago today, 52 people lost their lives during London's worst terrorist incident. At midday, a ceremony and minute's silence will be held at the Hyde Park memorial (right). A separate service will take place at Chatham House in St James Square followed by a discussion on the security response to the attacks and the remaining threat. A third commemoration will occur at a mosque in Leeds, reflecting on the positive role Muslims play in British life. Image / davograve@.