What country are they living in? The flavor of the strip tends to make me think that it is England (they tend to have very English mannerisms), but every now and then they seem to be from the United States (they drive a non-english car). I know this is not the most earth-shattering question but any opinions would be most appreciated.
The strip originated in Great Britain. It’s been running there for quite some time.
This page:
http://www.comicspage.com/fred/
says that the creator, a Mr Alex Graham, is a “native” of Glasgow, Scotland.
Thsi page:
http://members.aol.com/comicsproj/biogG2.html
says that the comic made its first appearnace in the “London Mail”, whatever that is, in 1965. I imagine they mean “The Mail”.
Google is your friend.