Not sure why you would ever need it, but if you ever did, then here it is:
Basically, a handy guide to which country you would end up in if you left the UK (or Ireland) and went straight North, South, East or West.
I might have to do one of these for SA. I know that if you head straight out from Suiderstrand, you end up in Uruguay. And if you head south from anywhere, you end up in Antarctica.
The East coast needs some work though.