Queen Elizabeth notes 'somber' mood

LONDON (CNN) - Britain's Queen Elizabeth II reflected Thursday on the economic and political crises sweeping the globe, acknowledging in her Christmas Day message their impact on holiday festivities.

"Christmas is a time for celebration, but this year it is a more somber occasion for many. Some of those things which could once have been taken for granted suddenly seem less certain, and naturally give rise to feelings of insecurity," she told Britons in a televised appearance from Buckingham Palace.

"People are touched by events which have their roots far across the world - whether it is the global economy or violence in a distant land, the effects can be keenly felt at home."

In her nine-minute message, she encouraged Britons to look for happiness and courage through helping others, and singled out World War I veterans and current troops in Iraq and Afghanistan as examples of courage and sacrifice.