I have British friends that use the word gobsmacked, and I've heard it in British television shows.
Edit:
If renting a German I'd like to go to the car rental place and say give me the fastest wheels you've got and equip it with Michael Schumacher as the driver.
There are lots of links on that page that try to open Outlook. Mine's blocked, so I don't know where they take you.
After all, do people in London, or all of England for that matter, actually use the word "gobsmacked"?
can't comment on England, or even Australia as a rule, but gobsmacked has always been used in my family.
it's one of those words where the very sound of it and the manner it's said, imparts it's meaning.
u avin a giggle ova there m8? I wrek ya in the gob i swear on me mum
oh gosh im not even from england