In the UK children are told to leave a mince pie & sherry for Santa, in the US there told to leave him milk & cookies. I always assumed the difference was because Americans were less comfortable with alcohol in public life, back when the Santa myth was being established. Am I right about that?
While there are British children who are told to do that, it's not a general rule and is probably better thought of as the custom of certain families rather than a national custom..