LONDON - Cheering crowds thronged the streets of London on Tuesday for the grand finale to four days of festivities marking Queen Elizabeth's Diamond Jubilee attended by millions across Britain. LONDON - Cheering crowds thronged the streets of London on Tuesday for the grand finale to four days of festivities marking Queen Elizabeth's Diamond Jubilee attended by millions across Britain. The 86-year-old herself cut a subdued figure as she attended a thanksgiving service at St Paul's Cathedral and a celebratory lunch without Prince Philip, her husband of 64 years who was taken ill with a bladder infection on Monday. It was one of the few grand state occasions in her life when he has not been present, taking some of the gloss of what is widely seen as a triumphant jubilee that has cemented the queen's popularity. "Our prayers and thoughts are very much with him this morning," Rowan Williams, the Archbishop of Canterbury and spiritual leader of the Anglican church, said in his sermon. Millions have attended street parties, watched a spectacular 1,000-vessel pageant on the River Thames in London on Sunday and a concert in front of Buckingham Palace on Monday, all held in honor of Elizabeth II, the only British monarch other than Queen Victoria to have reigned for 60 years. In a rare move, the queen, who usually only appears on TV screens for a short message on Christmas Day, will deliver a special broadcast be aired at 1700 GMT to thank the nation. Crowds began massing in huge numbers on the wide Mall avenue towards Buckingham Palace, turning the famous road into a sea of red, white and blue, for the jubilee finale when the royal family will appear on the balcony, with a fly-past by modern and former Royal Air Force aircraft.