Mike,
"Blighty" is, or was, slang for England.
It's a corruption of the Hindu word bilayati, meaning 'foreign', and was inevitably corrupted to 'blighty' by Indian Army soldiers, around the 1860s. Popularised in 1915 by jingoistic war-songs like "Take me back to dear old Blighty, Put me on the train for London Town" etc. In Oz/NZ the term would be Old Dart, Old Country perhaps?
Adaptable language English, isn't it!
Alan
