The Queen is ''absolutely delighted'' at the news of Prince William and Kate Middleton's engagement, Buckingham Palace said today.

After months of speculation, the couple finally announced they will marry in London in spring or summer next year.

William and Miss Middleton, both 28, became engaged while on holiday in Kenya last month.

A Buckingham Palace spokeswoman said: ''Both the Queen and the Duke of Edinburgh are absolutely delighted for them both.''