I pictured some Jehovah's Witness going over:
"Hi, I'd like to speak to the Queen."
"I'm afraid she's not home."
After peeking at the front lawn, JW replies, "Umm, I see the union jack. I know she's home."
The butler looks at the flag, and then back at the JW. "Fine! I'll get her!"
He closes the door and all we hear is, "Yo, Liz! Someone here to see you!" After hearing a garbled female voice, we hear the butler again, "Yeah, the Jack did us in again!"