We kind of stumbled across this museum and decided to go in since it was included with our London pass. We didn’t know much at all about the household cavalry so it was really interesting. The museum itself is quite small but definitely worth visiting. There is a window into the stables where the actual horses are cared for which was neat to see. They also do a changing of the guard in the morning (we didn’t see it) and at 4 a final inspection before end of duty. All day they have 2 sentries on horses outside so at the end of the day they line up with other guards (these ones were dismounted ) and the captain (I’m guessing) comes and inspects uniform and stance etc. It was a cool display to watch.