In the UK there has also been the relatively recent arrival of the "upward inflection", i.e. making statements sound like questions, which may also have arrived from Australia:
"in the UK many people take it as a given that the speech pattern arrived from Australia, going so far as to dub it the Australian Question Intonation. Some laymen go even further and trace the shift in British speech patterns to the arrival of soap opera Neighbours on British television in 1986."[0]