LONDON (Reuters) -Queen Elizabeth said on Sunday she had been “humbled and deeply touched” by the number of people coming out to celebrate her Platinum Jubilee at the conclusion of four days of festivities to mark her 70 years on the British throne. Tens of thousands of people have attended street parties or cheered on parades through central London, while millions watched a pop concert outside Buckingham Palace which was broadcast on live television. In her message to the nation, she thanked the public for their good wishes and the role they had played. “When it comes to how to mark 70 years …