The Queen led tributes to Diana, Princess of Wales today with the opening of a memorial fountains and gardens in Hyde Park.

The £3 million public area, designed to reflect popular perceptions of the Princess who died in a Paris car crash seven years ago, was unveiled this morning.

The Queen, together with Prince Philip, Prince Charles, and his sons Princes William and Harry, was among the party at the opening ceremony, together with Earl Spencer and other members of Diana's family.

Speaking at the unveiling, the Queen said Diana was a "remarkable human being" with a wonderful ability to embrace worthy causes.

She also paid tribute to the happiness she had given to her children William and Harry the Queen's grandsons.

Prince Charles and his two sons were to walk around the fountain to talk with guests.

The fountain consists of a massive water feature running around the edge of a landscaped area and gardens.

Water is pumped in both directions around the water feature, which measures about 80 metres by 50 metres, before coming together in a 'reflecting pool'.

The Queen also paid tribute to the designers and skilled craftsmen who had created the memorial fountain.