the prince, the prince even riding a horse called derby. the princess royal called derby.and royals riding noble and the duke of edinburgh , colonel of the of edinburgh, colonel of the london guards, is also is riding a horse called sirjohn, so they a horse called sir john, so they are part of the procession. leading the procession is brigade major , sorry, lieutenant brigade major, sorry, lieutenant colonel james shaw and of course four separate divisions, the blues and royals, of course, one of them as well. so it's taken a lot of practice to get this parade right, hasn't it ? parade right, hasn't it? >> yes. >> yes. >> huge amount of rehearsing, and, we'll go back to last year when there were those, guardsmen who fainted during one of the reviews. there was astonishingly hot weather. it's hard to believe it's the same country, but i think that's again why this is such an important event. come what may. this is such an important event. come what may . you know, come what may. you know, trooping the colour happens. you know, it is a sort of staple in the royal calendar, e