The Queen and Duke of Edinburgh are to miss the baptism of Prince Louis of Cambridge, has confirmed Buckingham Palace.
It is assumed that the decision was not taken for health reasons and was decided by mutual agreement some time ago by the Queen and the Cambridges.
The Monarch, 92, has a busy week ahead with high-profile celebrations in central London on the occasion of the 100th anniversary of the RAF on Tuesday and a visit by US President Donald Trump to Windsor on Friday.
The Duke of Edinburgh, 97, has withdrawn from public duties and enjoys his spare time outside of London.
Announcement of guests and godparents at the baptism of Prince Louis today: https://t.co/pEmVGoFcHw
– The Royal Family (@RoyalFamily) July 9, 2018
Louis, the 11-week-old youngest son of the Duke and Duchess of Cambridge, is baptized on Monday afternoon by the Archbishop of Canterbury at the Chapel Royal, St. James's Palace in London.
His six godparents were announced as: Nicholas van Cutsem; Guy Pelly; Harry Aubrey-Fletcher; The Lady Laura Meade; Mrs. Robert Carter; and Miss Lucy Middleton.
Baptism will be a small matter for the immediate family, the godparents and their spouses.
Prince George and Princess Charlotte will be there to witness the big day of younger brother Louis in the intimate setting of the oak-paneled Chapel Royal.
The grandfather, the Prince of Wales, and his wife, the Duchess of Cornwall, will be present, along with Louis's maternal grandparents, Carole and Michael Middleton.
The Duke and Duchess of Sussex will also be guests, as will Kate's brother James Middleton and Kate's pregnant sister Pippa with her husband James Matthews – the brother of former Made in Chelsea star Spencer Matthews.
The queen has spent time with the Duke in Norfolk and will travel back to London on Monday.
The monarch missed a service at St. Paul's Cathedral on June 28 because she felt "under the weather."
But she was in Edinburgh last week to get involved in the annual Holyrood week.
In May she had to undergo eye surgery to remove a cataract.
Philip had a successful hip replacement surgery in April but was good enough to attend Harry and Meghan's wedding in May.
The Monarch and Philip attended the baptism of Louis's older siblings George at the Chapel Royal in 2013 and Charlotte at the St. Mary Magdalene church in Sandringham, Norfolk in 2015.
As head of the Church of England, the Queen is a committed Christian and has a deep religious belief.
She also went to the baptisms of her other great-grandchildren Savannah Phillips and Mia Tindall, but neither she nor the Duke should have gone to Isla Phillips in 2012.