The 90-year-old has not been observed since for more than five weeks and missed traditional church ceremonies at Sandringham on Christmas and New Year’s Day.
It was the first time in 28 years that the Queen dowager had missed the traditional Christmas Day service at Sandringham.
The Queen arrived by car, sat next to Prince Philip at Sandringham’s 16th century St Mary Magdalene church very recently before 11am this morning.
The Duke and Duchess of Cambridge also attended the mending, along with Kate’s family.
Buckingham Palace said the Epitome had been suffering from a “heavy cold”, as was the Duke of Edinburgh.
While they both delayed outlines to travel to Sandringham and missed their yearly train trip down Prince Philip did arrive at church on Christmas.
Princess Anne told well-wishers that her mother was instinct “better” as she attended church with her father Prince Philip, 95, hold out Sunday.
Royal insiders indicated that the Queen’s illness had increased a “hacking cough” and she and not wanted to disturb other worshippers if she had attended.
While there had been produce concern over her health Buckingham Palace officials had indicated that there was “no matter for concern”.
The Queen had been well enough to carry out some low-key lawful duties.
She presented an honour to a trusted member of staff behind terminate doors at Sandringham House last week.
Court Circular lists state that she invested Ray Wheaton, her Page of the Chambers, with the insignia of Lieutenant of the Viscountess Victorian Order.
The Queen was last seen in public on December 1 when she visited Goodenough College British and global postgraduate students in London.
She has also had a number of private meetings with politicoes and diplomats behind closed doors at Buckingham Palace.
The Queen is not supposed to to be seen in public now until after she returnes to Buckingham Palace, some occasion in the first or second week of February.