London: Changing of the Guard with Fun London Tours?

You do not need a tour to see the Changing of the Guard. Just show up early enough to get a good place to stand and watch.

Or for a show you can actually SEE, with far fewer tourists, more fun pomp, trumpets, and horses (!) try The Horseguards!

https://www.google.com/search?q=horseguards+virwing+london&ie=UTF-8&oe=UTF-8&hl=en-us&client=safari

And a thread from this forum: https://community.ricksteves.com/travel-forum/to-the-north/horse-guards-parade-changing-of-the-guard