Princes remember their mother, a year on Prince William and Prince Harry have returned to Crathie Kirk at Balmoral to pray privately in memory of their mother - exactly a year after they attended a service within hours of her death. The sons of Diana, Princess of Wales were at the little church on the Royal estate in Scotland with their father, the Prince of Wales, the Queen and other members of the Royal Family. August 31 last year was a Sunday and the young princes - now 16 and 13 - were there, looking sombre, with other members of the Royal Family for the usual Sunday morning service. Today they looked equally serious and subdued as they arrived at the church for special private prayers. Afterwards, William appeared to look away from the media, gathered along the route, and Harry hung his head as they were driven from church across the River Dee and through the gates of Balmoral. At many cathedrals and churches throughout Britain, similar prayers were said - often with congregations just as small. In London, the Union flag flew at half-mast over Buckingham Palace as an official symbol of the personal and public remembering of the princess. The first anniversary of her death was marked by groups of people gathering at places linked with her life and death, in Britain and Paris. At Crathie, Prime Minister Tony Blair and his wife Cherie were first at the grey granite church, a short drive from the Balmoral gates, followed a few minutes later by the Royal Party. The Queen, wearing a grey outfit, arrived in a Rolls-Royce with the Duke of Edinburgh, Duke of York and his children, Princess Beatrice and Princess Eugenie. The 98-year-old Queen Mother was accompanied in her chauffeur-driven Daimler by the Prince of Wales who wore a kilt. William, in a grey suit, and Harry, in a navy suit, travelled in a Vauxhall people carrier with Prince Edward and his girlfriend Sophie Rhys-Jones, the Princess Royal with daughter Zara and husband Captain Timothy Laurence. The royal group left the church after about 15 minutes for the drive back - watched by a few members of the public, most of whom had travelled long distances to be there. The Royal Family, including Princes William and Harry, had attended the regular weekly service at the church yesterday. Earl Spencer was marking the anniversary of his sister's death with a private service overlooking the lake where Diana, Princess of Wales, is buried on a small island. Members of the Spencer family and estate workers at Althorp, Northants were joining in the service near the memorial to the Princess. The estate was closed to the public after yesterday, following two months during which people had been able to view the island. Today bouquets had been left outside the gates. In Paris, the place and the moment where the Princess had met her faith had been marked by a small crowd. They kept an all-night candlelit vigil above the underpass where the Princess was fatally wounded in a car crash. Today more people were arriving at the scene, spending time standing and staring at the scene. In London, people at the Harrods store in Knightsbridge got an earlier view than expected of the shrine set up by Mohamed Al Fayed in memory of the Princess and his son, Dodi. The 8ft high bronze sculpture, put up in one of the front facing windows, was expected to be unveiled by Mr Al Fayed today but instead was simply displayed after being set up overnight. Two bronze framed photographs of Diana and Dodi, encrusted with seagulls and other birds, are mounted on a plinth above a slowly trickling waterfall surrounded by foliage and four everlasting candles. Mr Al Fayed's spokesman, Laurie Mayer said: "We decided simply to set the shrine up overnight rather than have it unveiled because we didn't want accusations of trying to compete with other memorials. "The shrine symbolises Diana and Dodi's last holiday together, when they were both very happy." Half a mile away, people were arriving to see more than 1,000 bouquets left on the gates of the Princess's former home, Kensington Palace. Up to 100 people had maintained an all-night candlelit vigil there. They arrived with candles just as the gates of the palace gardens were closing at 9pm. Royal Parks police relented and reopened the gates after pleas from a gathering of around 30 people. Shortly after midnight, the crowd had swelled to around 100 as safety floodlights were lit. Many of the candles were placed among the floral bouquets and messages left during the day. By early afternoon, thousands of people had poured through the gates of Kensington Palace, many carrying blooms as a tribute to Diana. Others - some in tears - simply stood and stared at the growing carpet of flowers. Many families, most with very young children, picnicked in the gardens under the late summer sun.