We do this!
It is unlikely that anyone will say this to you, but, since the UK pavilion represents the UK (not just England) I thought I would just throw in
"Shwmae" (shwmy)
Which is "hi" in Welsh.
I am so happy ,that after 15 years,this post is still being enjoyed! My son,Erich,is now 24....he still likes to use these hellos, but it's now when he orders a beer at the various countries! LOL!