• Queen Elizabeth will miss her Platinum Jubilee service at St. Paul's Cathedral on Friday. 
  • Buckingham Palace said the queen experienced some "discomfort" during her birthday parade on Thursday.
  • The Queen still plans to attend an event at Windsor Castle on Thursday night.

Queen Elizabeth will miss her Platinum Jubilee service at St. Paul's Cathedral in London after experiencing "discomfort" at an earlier birthday parade, the BBC reported on Thursday.

"The Queen greatly enjoyed today's birthday parade and flypast but did experience some discomfort," Buckingham Palace said in a statement shared with the BBC.

It continued: "Taking into account the journey and activity required to participate in tomorrow's National Service of Thanksgiving at St Paul's Cathedral, Her Majesty with great reluctance has concluded that she will not attend."

Buckingham Palace said the 96-year-old Queen is "looking forward" to attending an event at Windsor Castle later on Thursday. 

The announcement comes after Buckingham Palace said Prince Andrew would miss out on the celebrations after testing positive for COVID-19. 

This story is developing. Please check back for updates.

Representatives for Buckingham Palace did not immediately respond to Insider's requests for comment.

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