On 6 June, the Queen lit a bonfire beacon at Windsor Castle, the light of which spread across the night in a chain of other beacons throughout the whole country. On 7 June, crowds lined the route of the procession to St Paul's Cathedral, where the royal family attended a Service of Thanksgiving alongside many world leaders, including United States President Jimmy Carter, and Prime Minister James Callaghan as well as all of the living former Prime Ministers (Harold Macmillan, The Lord Home of the Hirsel, Sir Harold Wilson and Edward Heath). The service was followed by lunch in the Guildhall, hosted by the Lord Mayor of the City of London Peter Vanneck. At the reception, the Queen was quoted as saying: