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. the princess of wales, back in the public eye. riding in a carriage with her three children at the king s birthday parade. all eyes on her for her first appearance since her cancer diagnosis was announced. she was a huge draw for the crowds in central london today. this is a day full of tradition and spectacle, but it s also about family. the king and queen in their carriage. it s his first trooping the colour since his own cancer diagnosis, and he chose not to travel on horseback. the troops taking part have been rehearsing for months. every step, drumbeat and musical note has to be perfect. the irish guards are leading the event this year and their colour, or regimentalflag, has been on full display. their royal colonel, the princess of wales, looked on with her children as the king took the salut