A royal expert has said that Queen Elizabeth II "was never the same" after the death of her husband Prince Philip, and "ultimately died of a broken heart".The monarch was laid to rest on Monday in a state funeral watched by millions across the country, with a service at Westminster Abbey before a procession to Windsor Castle - where she was buried alongside the love of her life, Philip.The late Duke of Edinburgh passed away in April 2021, just two months before his 100th birthday. It was a difficult time for the Queen, having to sit alone for the service due to the restrictions of the coronavirus pandemic. But a royal expert has suggested that the pain of losing Philip stretched far beyond his funeral, and continued up to her death earlier this month.