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With thousands dead amid the outbreak, the monarch decided that the celebratory display of military firepower would not be appropriate.
Nor will there be a celebratory peal of bells at Westminster Abbey, as the church where the queen was married and crowned is currently closed.
The royal family took to social media to share images of Elizabeth as she marks the occasion — but in keeping with social distancing rules, there will be no visits.
The queen will mark the day with her husband, the Duke of Edinburgh, 98, at Windsor Castle in Berkshire.