of the royal family at the annual trooping the colour parade to mark the king s official birthday. it s the first royal engagement she has carried out this year. the king, who is also receiving cancer treatment travelled with the queen in a carriage, instead of riding on horseback as he has done in the past. charlotte gallagher reports. a much anticipated moment. the princess of wales back in the public eye. all eyes on herfor herfirst appearance since she announced her cancer diagnosis. she was a huge draw for the crowds in central london today. this is a day full of tradition and spectacle but it is also about family. the king and queen in their carriage. it is his first trooping the colour since his own cancer diagnosis and he chose not to travel on horseback. the troops taken part in this annual celebration of the king s official birthday have been rehearsing for months. every step, drumbeat and musical note has to be perfect. the irish guard led to the event this year an