Hi,

We are planning a visit to Buckingham Palace, London. It is known that the Changing of the Guards take place at 11:30 am, lasting about 45 minutes.

So it seems we could watch this ceremony, and then visit the State Rooms at about 12:30.

But I'm confused of this: Do we need a ticket to watch the Guard Changing? Or we just wait outside the Palace to witness it?

My sincere thanks,

Nope. Just show up. :) But get there early as it's just about the #1 tourist attraction in London, so it's almost always swarmed with people. I myself have never managed to see it.