Royal Family
The reigning monarch is determined to attend the royal event.
Trooping the Colour has marked the official birthday of the British Sovereign for 260 years.
Per theDaily Mail, Charles isdetermined to attend the celebratory paradeon June 15 despite his ongoing cancer treatment.

The late Queen last rode her beloved steed Burmese at the 1986 parade.
In the decades following, she attended in a royal carriage.
At this years procession,sources claimthe King might similarly travel by carriage instead of on horseback.

It would be change from 2023, when herode horeback.
source: www.bustle.com