Britain hails queen at 90, a constant in years of turmoil

Britain celebrated the 90th birthday of Queen Elizabeth II on April 21 with tributes to a popular monarch who has steered it through the decline of empire and a wave of scandals to the Internet age.

The sovereign, who has been on the throne since 1953, emerged from Windsor Castle dressed in a lime green outfit and matching hat to accept presents and flowers from hundreds of well-wishers.

Prime Minister David Cameron hailed her as "a rock of strength for our nation" while her son and heir Prince Charles marked the occasion by reading Shakespeare in a special broadcast on BBC radio.

Later on, the monarch, who last year overtook her great-great grandmother queen Victoria to become Britain's longest-reigning monarch, will host a family dinner to celebrate.

She will also light a beacon, the first in a chain of a thousand which will be lit around the country and the world, symbolizing the length of her life and her reign.

In an address to the House of Commons to mark the occasion, Cameron said she had been "steadfast, a rock of strength for our nation, for our Commonwealth and on many occasions for the whole world".

He said Britain was "uniquely blessed" to have her and praised the queen's "unshakeable sense of duty" while noting she was now "starting to take things a little easier."

While still an active monarch, the queen has scaled back her duties in recent years as Prince Charles and grandson Prince William plus wife Kate take a more prominent role.

The royals remain popular but some analysts question what will happen when the queen - who is in good health, enjoying regular rides on her favorite pony and walking her corgis - reaches the end of her life.

In an editorial, The Times newspaper...